Student Housing / Weight room question

[Franco Urbaez]

I have an insurance, legal question..  I am putting in an offer on a 5 bedroom mansion-style house and was thinking to finish the basement and add in a weight room.  Minor stuff, maybe a rack of free weights, a benchpress, and a treadmill with a few full body mirrors and maybe a small TV.  

Do you think this is setting me up to be sued later if someone gets hurt using the weights?  Or is this a waiver I can simply add in to the lease if they get injured using the weighs?  Or something that a simple "Use at your own risk" sign posted will resolve?

Thoughts would be appreciated please!  Thanks!