Pay-per-visit Gym?

Do any local gyms offer a pay-per-visit option? I'm just looking for somewhere to go a couple of times per month on the weekends if it's too rainy to run outside.

I think most do--I know Motion does. But I believe it's $20 per visit (whereas I pay $75 per month for full membership. If you just want to use the treadmill I might look into Eastside. Their membership is already pretty inexpensive but I'm not sure if they offer anything by the month or visit.