Really can't find a better deal than the UNLV Rec Center B)
+ quality of equipment - tvs on half the cardio equipment and plug in work out tracking and power charging for those with ipods and other apple toys that loose battery life at the end of a long day on wireless
+ times and # of class offerings - crack of dawn cycling or after five whatever you feel (dance, boxing, yoga, bootcamp)
+ hours of availability - 6AM - 12AM you really can't complain about, unless you like working out in the wee hours
+ decent crowd but can always find something to do when its busy - the clientele could be much worse than the occasional group of people that seem to gossip more than anything
+ the location is so convenient if you have to take the 215 or 15 cross town. Just get off at the airport bypass or Tropicana. Less than 10 min from freeway.
And the amenities don't stop at weights, cardio and court games. On the first floor behind the check in desk there's an office where you can rent outdoor equipment for a weekend or weeks at a decent rate. They have just about everything - canoes, snow shoes, head lamps, and bags and trailers to carry it all in.
They also have 3 - 4 trips to national parks each semester. You can get a huge discount on these if you sign up at the start of the semester. http://www.unlv.edu/srwc/fitness-rec/equipment-rental