Alternatively, are they located in shared office buildings with a common gym?

Companies like Google, Infosys etc have gyms: https://www.sportzbusiness.com/top-5-corporate-offices-with-great-office-gym/.

I think a treadmill or exercise cycle would be helpful as most law firm employees work from 10 to 10, eat McDonald's burgers and get fat. Even those who were thin in law school look like baby elephants now.