When I worked for a summer at a research center for a big famous company, they had a covered outdoor bike shed where I'd lock my steel road bike. I no longer have that bike so if I were ever to go back to work there I'd have to weigh bringing my folder inside (folded of course) vs. locking it. I think I'd probably lock it. I don't know that I'd leave my carbon road bike in a common area like that -- too many ways for serious accidental frame damage to occur.