Big locker room, private shower stalls (with laundry hooks to dry off my riding gear,) I park my bike in my cube when it's dry and in the locker room when it's sopping wet.
I'm the only regular bike commuter out of 80 people at this facility. There's 2 more commuters at one of our other facilities, out of about another 100 people. (They have indoor bike parking and a nice locker room setup over there, too. And a basketball hoop in in the back parking lot.)