Bike lockers have some interesting complications in this pot 9/11 age. At least at my work.

Rules:
you can only use the lock supplied by security (fairly light weigh keyed master lock) that they have the master key to.

you can only use the locker during the day, no overnight storage and no leaving the lock on the locker even with nothing in the locker

apparently this is because they have to control any space where a bomb could be put.

I just use my cube as the my bike doesn't fit the locker and so far facilities hasn't dnged me for it.

Bottom line, some of this stuff may add resistance to getting a locker outside.