I joined a gym near my home, it is called "il pardo" and it is used by skinny women. Lots of them. I suppose it has something to do with the fact that this is a reasonably up-market gym - for those of you in Singapore think - more towerclub than california fitness. so I am surrounded by 50 year old italian women with botox faces and cellulite free bodies - I hate them all! However it is pretty comfortable, and convenient, they have pilates and yoga classes (taught by the flamboyant gay guy that seems to be a fixture in all such gyms - you have to air kiss him before the start of the lessson!) and anyway I need the exercise to go to the beach without any hangups.
There are turkish baths (i.e. what we call a steam room with pretty murals) and sauna and cold pools and stuff like that on one floor, and Everybody walks around there in the buff. It is really a bit unnerving the first time, but you look like a freak if you are NOT naked. i suppose this is the way the gym motivates people to go and excercise. I mean - you really do not want 20 other people to look at your cellulite and grin smugly do you??