You could do what I did when I moved to an area w/o a full service gym: Get your own spin bike. They aren't terribly expensive. Or get a stationary trainer for your bike. Either way, buy some training videos and off you go, so to speak. Sometimes if I don't feel like watching a video, I just listen to some music and do whatever moves me. Spinning isn't rocket science. So long as I get my heart rate up, I'm pretty happy with my work out. That said, I've taken enough formal spin classes, that I know most of the dos and don'ts.
Otherwise, just check out every gym in your area for class availabilty. Are there Ys in your area? LA Fitness? Anytime Fitness? I have to imagine that most of the major burbs have more than own full service gym. When I was a Y member, I just planned on getting to class early to get a spot. If you're already a member at a gym and its classes are always full, talk to them about adding some classes.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher