Curves
The opening hours (at least in Carrick on Shannon and Longford) are fairly restrictive by comparison to regular gyms and seem to suit stay-at-home mums or part-time workers, i.e. not open very early or late. No showers either, so you couldn't go before work or go out straight afterwards.
I would say the whole thing was a gimmick, except for my sister lost the last half-stone she'd been trying to shift by every other means (cutting down on food, walking the roads etc. etc.).
Curves are more of a "system" it would seem, than just plain old exercise. They reckon you can do an hour's workout in half an hour by using their special machines, which are not like the ones in the regular gym. The exercises are supposed to be more intense because they work antagonising muscles together (or something like that). You are also encouraged to buy books and follow the curves eating plans, which are basically a couple of weeks of crash diets/detox and then re-introducting foods slowly, as far as I can see. Like I said, I'd call it a gimmick/fad, but my sister swears by them.
I think you can pay monthly with no strings, so worse case, you loose 40 euro or something. At least that's not the end of the world if you don't bother with it.
Rebecca