I am looking for a bike rack for a closet in my apartment next year. The closet's not all that big, and I attached a floor plan. I want to hang my 2 bikes vertically but the catch is that we obviously can't drill any holes in the walls. The first choice would be to just put a couple hooks and hang them that way, but that's out of the question. The ceiling's about 10 feet, probably. Any suggestions?