Experience with Having Gym on Investment Property?

Hello Everyone!

I wanted to know if anyone has experience with having a gym on one of their investment properties? If so, how your experience has been so far and if you could share any lessons learned?

Do you have your guests sign an additional liability waiver before using the gym equipment in case of injury and if so, how do you have them sign it once booked? (ie Docusign link, in person, etc)

For all of you that think gyms are extra liability and should be avoided, I just want to hear about any actual experience someone has had in the area.  Any insight is appreciated for those who have experience in this area. Thank you!