Losing weight is hard enough to add something you don't like doing on top of it. I say, if you can quit the gym without a penalty (not sure if you are stuck in a contract) then I say quit it for now and just do zumba. If you love it, keep doing it. And it will relieve your stress about having a membership you don't want to use right now. However, I should caution you that it's possible too much of a good thing can sometimes be too much. You might get bored or you might build up such a resistance that you need something more challenging like doing the elliptical, stationary bike or treadmill.
When I first joined my gym I only focused on doing the video's and cardio equipment. It was after I lost about 20 pounds did I start using the weight machines to begin toning and muscle building. Especially after I found out that the more muscle you have, the more calories you burn during the day when sedenary! Do I love weight lifting? Heck no! But I do it because it's not that hard and the rewards are awesome!
You can always rejoin a gym later --- and hopefully one closer to home.
And ps: You are NOT a lost cause despite your 3FC name! Keep up the great work!
Restarting my journey exactly 4 years from when I first started in January 2011. Reached my goal weight in 2012 and regained half of it back.
I never should have left 3FC!