At my work we have a few bike lockers



And an old-school rack (like the one Diablo posted, except not alternating sizes)



The lockers have plywood diagonally down the middle and doors on either end, so they need space all around. I used to just put my bike in the old-school rack and often not even lock it. But recently another bike-commuter won a premium reserved parking space in a raffle, and he got them to move one of the bikes boxes into it. He lets me use the other half, which is nice, because it's a lot closer.