Maybe this is not what you want, but I do know Palm Beach Community College (Lake Worth, FL) does have music courses and did at one time have bass classes.
You may not want bass classes in a group setting. I also do not know if these classes have a heavy emphasis on theory as part of the course work. And I also don't know if you do or do not want heavy theory studies. Lastly, these classes probably lean more toward jazz rather than pop
pr metal or country. I don't know what your music preference is.
You could also check Broward Community College for such courses. Another thought is to check the stores that sell music instruments. They often know of bass teachers and may even have one on their staff who teaches right in the store. That, in fact, is the way I had my very first bass classes...right in the store where I bought my first bass.
Sometimes the music instrument stores also have bulletin boards with small announcements by bands looking for musicians and offers of guitar, drum or bass classes. As a last resort, check classified ads in the newspaper.