Ideas for a 7000 sq. ft. basement. Downtown

[Eric K.]

Currently, I have 7,000 sq. ft. of unused and unrented basement space. It is in the heart of downtown of a smaller (14,000) city. I am brainstorming on what I could use it for.
The building is zoned for commercial and residential. Needs to sprinkled for a leasing of the entire basement or a firewall to reduce open footage to 5,000 or less.

The basement is mostly carpeted with several rooms that were rented in the past. There is wiring for internet and tv. There are two working bathrooms.
On the negative side there is no handicapped accessibility.

Thanks for your time!