You can rent a car to get around Bell Gardens if you don't have your own. The cost of a rental car for the day is around $40+. Alternatively, Uber and Lyft are both available, and will cost approximately $20+ depending on the distance travelled.
If you have more time, consider exploring the nearby city of Los Angeles, which is only a 20-minute drive away. You can visit iconic landmarks such as the Hollywood Walk of Fame or the Griffith Observatory. Additionally, if you have less time, skip the spa and spend more time at the casino or brewery.
The closest airport to Bell Gardens is Long Beach Airport (LGB), which is around 11 miles away from the city center. Other nearby airports include Los Angeles International Airport (LAX) which is 20 miles away and John Wayne Airport (SNA) which is 30 miles away.