Are there lockers/changing rooms?

There are 2 changing rooms, actually. I've never had to wait for one.

There are about twenty lockers and one changing room. They don't provide you lock so bring your own. There is security camera on top of lockers.

Yes.

Not on the traditional sense. Lockers are out on the gym and the changing room is more of a changing closet. This place doesnt have a locker room for either gender.