Very busy local dance studio and gym with an impressive array of classes to keep you fit and motivated from fencing to pole-dancing via tai chi, yoga and of course, the tango which is one of their best classes.
There's plenty of group activities here or you can hire a personal trainer or masseur for a bit of one-on-one self improvement or pampering. you don't need to be a member but you should certainly give them a ring before your first visit. Maybe even take a friend along if you are planning to dance...