There's no denying that this is a very convenient location since it's right next to Union station's York concourse (and literally a 10 minute walk from my condo) but it's also very small... The equipment is older and placed so close to each other that it barely leaves any space to navigate without getting hit by someone performing their exercise.
You would think a prime location like this would have longer operating hours, but nope they close at 10 PM on weekdays while the random one near Old City Hall closes at 11 PM.
They're also closed on public holidays, so I'm assuming they're catering to GO train commuters from the suburbs and not the actual people who live nearby (new flash: not all condo gyms have free weights and barbells).