I work on the 13th floor of a 14 floor building in Boston. Does that Count? lol They just built this HUGE hotel/condo complex right next door to our building and when the construction was going on, they had a temporary exteirior elevator for the workers. They skipped the 13th floor, but I heard that this is common with construction companies to do this as they are superstitious about the 13th floor and work injuries.
Now that the build is nearing completion, I dont know if they in fact left out the 13th floor. interesting enough though.