Anyone here use the Memorial Park Fitness Center?

I signed up for it the moment I saw they waived the fees, but I’m not totally sure how it works after registering online. Do you just show up with an ID, or do you need to pick something up first? Main thing I’m hoping to use are the showers. Since my phone plan’s out I can’t call to ask, and I’m currently homeless so I’m trying to figure this out before I head over.

For anyone who goes there often, when’s the least busy time of day? Thank you