How much is a gym membership?
Thanks for asking! The Recreation Center has a lot of different programs with different costs and target audiences, so I think the best thing I can do is steer you toward the information page on the City Parks/Recreation web site. Reading there, it looks like they do "memberships" in the form of multi-use passes that offer access to the gym and weight room. So for adults one visit costs $3, a ten-visit pass is $15 ($1.50 per) and a 20-visit pass is $25 ($1.25 per.) They have lower-cost or free options available for kids, teens, and seniors.
I hope that gets you some of the information you need! I'd encourage you to contact the Florence Rec Center directly at 402-444-5216 with further questions - they've always been good neighbors with the library, but they'll be better able to fill you in on their operations.