I guess I'm lucky. There are approximately 12 lockers in the change room. They were initially reserved for one of the offices in our building in which staff had to do dirty work (mine cable testing was one of the duties). Since then, this work has been done elsewhere, the office has a smaller number of staff and the lockers appear to be available on a first-come first-served basis. Two friends who are part-time bike commuters make use of the lockers. In my office on the third floor, there are "remnant" lockers from when part of our office was the staff area for a former cafeteria. I am the only one who uses a locker (there are only 4 and I have occasionally used 2 of them, shame on me).