I go to a snap fitness near my house and love it--very convenient--you can go 24/7/365 by just letting yourself in with a swipe card. Seems safe due to cameras on all the time. Alot of hot guys workout there, too. It has all the cardio machines, different equipment and free weights you need. No shower or locker rooms, though. Costs less than full-service gyms.
Most places that have the swipey cards are 24/7 access gyms. And they're bad ass.. I really enjoy the idea. The ones I'm familiar with had showers, and locker rooms. Just had cameras on the doors to monitor who went in and out, in case of an incident. From what I've heard though.. they're definitely worth checking out. Especially if you're the kind of person that doesn't stick to a particular time of day for a work out (like me).. and on top of a regular routine, just likes to go when the mood strikes.