There are some very good council facilities. I know that Camden has some (Swiss Cottage I think), also the Islington Highbury gym, is fairly good - not as slick as others, but it has what you need (inc. a pool) and plenty of classes.
Also there are probably some deals to be had if you look around. Partnerships with credit cards, I remember a few years ago one health insurance co, gave Virgin membership at a discount, and if you went over a certain number of times a month also reduced your insurance premiums.
Where do you live?
There are some very good council facilities. I know that Camden has some (Swiss Cottage I think), also the Islington Highbury gym, is fairly good - not as slick as others, but it has what you need (inc. a pool) and plenty of classes.
Also there are probably some deals to be had if you look around. Partnerships with credit cards, I remember a few years ago one health insurance co, gave Virgin membership at a discount, and if you went over a certain number of times a month also reduced your insurance premiums.