Kick off your first morning in Bangkok with a relaxed riverside breakfast at The Deck by Arun Residence overlooking the Chao Phraya, then take a short long-tail boat ride to explore the historic Rattanakosin Island neighborhood with its old-world streets and hidden cafés. Spend late morning wandering the galleries and craft stalls around [Bangrak Art & Culture Centre (BACC)](https://www.google.com/search?q=Bangrak+Art+%26+Culture+Centre+%28BACC%29+bangkok+on+18+and+21%2C+pataya+on+19-20%2C+18+march+to+22+march%2C+group+of+5+friends%2C+with+party+destinations+%26+city+explore%0A+official+site) and refuel with street-food classics-try pad thai and mango sticky rice at the lively stalls along Chao Phraya Riverwalk before heading back to your hotel to freshen up for the day's onward adventures.
After a riverside morning, head to the trendy Thonglor neighborhood for lunch and bar-hopping-start with modern Thai tapas at Soul Food Mahanakorn then browse boutique shops along Soi Thonglor. Later, wander the photogenic lanes of Ekamai and stop for coffee at the cool Cute Press Cafe before gearing up for the evening with cocktails at the skyline-facing Octave Rooftop Bar to watch the city transition from day to night.
As night falls, head to the lively Chinatown (Yaowarat) for an immersive street-food crawl-sample grilled prawns, peppery crab omelette, and exotic fruit stalls while weaving through neon-lit alleys. After filling up, take the group to the buzzing Asiatique The Riverfront for riverside bars, boutique stalls, and a ride on the Asiatique Sky ferris wheel to get a glittering view of the Chao Phraya; finish the evening with live music and craft cocktails at the nearby retro-chic Maggie Choo's to kick off your nightlife warm-up.
After an easy breakfast and check-out in Bangkok, catch a comfortable van or private transfer to Pattaya (about 2-2.5 hours) and drop your bags at your hotel near Pattaya Beach. Stretch your legs with a laid-back stroll along Pattaya Beach Promenade, grab fresh seafood and Thai iced coffee at a beachfront shack, then hop on a local shared boat to the quieter Naklua Beach for swimming and photos before lunch-perfectly timed to keep the group energized for an afternoon of sun and parties.
Ease into the afternoon with waterside cocktails and light bites at Horizon Rooftop Bar (Hilton Pattaya) while enjoying panoramic sea and skyline views, then head for an adrenaline boost with jet-skiing or flyboarding sessions at Jomtien Beach Adventure for the group's first taste of Pattaya water sports. Wind down before nightfall by exploring the colorful stalls and seafood grills of Thepprasit Night Market-perfect for trying local snacks, picking up quirky souvenirs, and planning which bars to hit later.
As the sun dips, head to the lively Walking Street to soak up neon-clad nightlife-start with seafood tapas and cold beers at King Seafood Restaurant before wandering between live-music venues and themed bars. Later, dive into the club scene at Mixx Discotheque for late-night dancing or catch an energetic cabaret show at Tiffany's Show Pattaya for a glitzy, unforgettable group experience.
Catch an early speedboat from Bali Hai Pier for a half-day island hop to Koh Larn (Coral Island)-snorkel amid colorful reefs at Ta Waen Beach, rent a banana boat for a lively group splash, and relax with fresh coconut water under shaded umbrellas. Afterward, swing by Pattaya Floating Market for a late-morning stroll through wooden stalls and sample regional treats like grilled squid and mango sticky rice before heading back to base to recharge for the afternoon's adventures.
After a sun-soaked morning, recharge with lunch and chilled beers at the beachfront Pattaya Beer Garden, then head to Underwater World Pattaya for a relaxed afternoon wandering the glass tunnel and spotting rays and tropical fish up close. Later, get your adrenaline fix with a sunset parasailing session off Jomtien Beach followed by rooftop cocktails at Sky Gallery Pattaya as the group watches the sky turn golden and plans the night's party route.
As night falls, head for dinner at the lively Rimpa Lapin cliffside restaurant for sunset seafood platters and panoramic bay views, then stroll to the nearby Royal Garden Plaza for a quick round of arcade games or karaoke to keep the group's energy up. Afterward dive into Pattaya's late-night scene with craft cocktails at the intimate speakeasy The Sky Roof Bar & Restaurant followed by high-energy dancing at Insomnia Pattaya-a perfect sequence to cap a day of islands and adrenaline.
Start your Bangkok return with a temple-hopping morning at Wat Saket (Golden Mount)-climb the mellow steps for sweeping city views and a peaceful alms-offering moment with the group. Wander next to the nearby Pak Khlong Talat (Flower Market) to soak up riotous colors and snack on fresh tropical fruit from stall vendors before stopping for a late-morning brunch of river-style noodles and iced Thai tea at the riverside favorite Baan Khanitha by the River to recharge for an afternoon of markets and museums.
Stroll through the colorful aisles of Chatuchak Weekend Market (or the smaller JJ Green if you prefer a chill vibe) hunting vintage finds, quirky souvenirs, and street-food snacks like grilled satay and coconut ice cream before lunch. Later, dive into contemporary Thai culture with immersive exhibits at the sleek Museum of Contemporary Art (MOCA), then recharge with specialty coffee and Thai fusion bites at the nearby Gallery Drip Coffee before an evening of rooftop bars and clubbing.
As dusk falls, dive into the lively vibes of Khao San Road with street-food stalls, neon bars, and live buskers-grab buckets of cocktails and sample spicy pad kra pao from a favorite roadside vendor. Later, head to the nearby chilled-out riverside hangout Riva Arun Bar for riverside views and craft cocktails, then finish the night in the trendy Ratchada Train Night Market area hopping between open-air bars, quirky pop-up stalls, and late-night seafood grills to soak up a festive Bangkok evening with the group.
Ease into your final morning with a leisurely brunch at Casa Lapin X Kasemsan 3, sipping specialty coffee and sharing small plates while swapping highlights from Pattaya and the city. Wander the nearby boutique lanes of Ari to pick up last-minute gifts from indie stores and craft bakeries, then head to Siam Square One for quick souvenir hunting at designer pop-ups and a final Thai massage at the cozy Perception Blind Massage before returning to the hotel to pack and depart.
Spend a relaxed afternoon strolling the riverside promenade at ICONSIAM River Park, sampling artisanal snacks at the indoor SookSiam food halls and picking up polished souvenirs from the boutique stalls. After a light riverfront lunch, take a gentle long-tail boat trip to Khlong Bang Luang Artist House to enjoy local art, grab final coffee at the charming The Artist's House café, and return to the hotel with just enough time for a speedy check-out and transfer to the airport.
Cap off the trip with a relaxed final evening at Vertigo and Moon Bar (Banyan Tree) for sunset cocktails and panoramic city views that let your group toast the week's highlights. Afterwards, wander through the lively stalls and neon-lit lanes of Talad Neon Downtown Night Market to grab any last-minute street-food snacks and quirky souvenirs, then finish with a late-night supper of boat noodles and spicy papaya salad at the beloved local eatery Victory Monument Boat Noodle Alley before heading back to pack and depart.