Working out finding classes [spinning,Martial arts,Aerobics ect]

Can anyone recommend some good reliable places that have workout classes, nothing like sharing the pain/fun with others.

Thanks

There is one near my apart street 280 ming hour sport club not so far from wat mahamantre I'm not sure how to spell, I love the place hot and cold Jacuzzi, spa, pool and brand new machine at the gym. Only 42$/ month.