So, where to find samba classes. You can always look online, and search to make sure that there is a location near you, that's going to be convenient for you to go on the weekends, or just right after work. Just make sure that you can stick to your workout routine, and make samba part of your life.
Also, if you are in New York, (?) major universities, they are going to be offering Afro-Brazilian samba classes, dance studios, and most of the health fitness clubs offer samba classes as well.
It's can derive from light drums, Afro-Brazilian samba, to just a sixty minute samba workout played by a CD. But no matter what type of a samba class you're looking for, they both offer the same high-energy, and fun exercise. And dancing.