Begin your day by visiting some of Frankfurt’s best beer gardens. Start with the Biergarten im Ostpark, and be sure to try their home-brewed beer. The O'Reilly's Irish Pub is another great option for a beer or two. After that, head to the Der Gerbermühle Biergarten, situated on the banks of the Main river. Enjoy the beautiful views whilst having a cold Bavarian beer.
Start Day 2 with some high-speed action at Kartbahn am Ratsweg. This go-kart track offers 650-meters of pure adrenaline. After that, have an early steak dinner at the famous Mosebach Restaurant, situated in the heart of Frankfurt. This splendid restaurant is well-known for its locally sourced and high-quality meats. The owners of the restaurant import the finest beef from around the world and offer a variety of cooking methods for their steaks. This is a great place for the perfect bachelor party dinner, with some fantastic wine and cocktails to go with your meal.
For those with more time, consider a guided Frankfurt Pub Crawl or try some of Frankfurt's excellent clubs such as the Gibson or the King Kamehameha Club. For those with less time, consider removing the O'Reilly's Irish Pub and simply spending more time at the other two beer gardens. Another option would be to switch Day 2's dinner for something else entirely, such as a visit to The Frankfurt Zoological Garden or a day out at the Rhein-Main-Therme thermal baths.