To Curve or not to Curve....

That is the question....Should I join Curves or not? I have been debating whether or not it would be beneficial for me to workout there. The center is 1 mi. away so conceivably I could get a 2 mi walk and a 1/2 hr workout all rolled into one. Will paying for a monthly membership be more motivating? I can try the first month for $30 without signing a contract, so there really isn't a downside. I don't know. Thoughts? Opinions welcome!