Just make sure you are actually getting a workout there. I go spinning now and then, usually when the weather is nasty enough to make me not want to be outside. There are a lot of different types of people there. There will be the people who look like they are really working out, but then if you pay attention you'll notice they never really crank up the tension. There are those that crank up the tension too much, and end up leaving or not doing much work half-way through the class.