if the cost is attached to another one of your rresolutions it'll pay off. I'm not gonna lie it get's difficult for most of us to change our regular routines...especially when it comes to things that we want to and don't want to do at the same time.
If you find that it doesn't cost much...you might not attach the value of a healthy lifestyle to a decent workout regimen. With a higher value membership it'll force you on a subconscious level to actually make the most of it...trust me I used to workout on a regular basis myself, if it wasn't for the fact that it was money that I couldn't afford to go to waste, I probably would've been chasing more women then.

ask yourself this what's the cost of not going...