I have been on/off with the gym for many years. I know that convenience is major -- if it takes alot of time (which most of us don't have) to get there, it probably won't work. But you also have to be comfortable. Most of our gyms now offer a free week for you to try it out. I would do a week at each one to see what works for you.
As for me, I am still paying for the gym, but doing most of my exercise at home. I used to go in the mornings but once you stop getting up at 4:35 am to get there, it gets really easy to not get up. I now get up at 4:55 and walk for an hour outside with my dog. I have started doing Spark People videos for strength training. I was more impressed than I thought I would be. I do have dumbbells and a balance ball at home.