I don't leave my drop bar bike in the rack, it comes inside with me. I think it's about 50/50 split around here. At my previous job, drop bars were a fairly strong majority.
My commuter has MTB bars. Last night I went out to get my bike and someone had parked a drop bar bike next to mine. Was really annoying getting my bike out of the rack. It's funny, because when I parked a drop bar bike out there it used to annoy me of all the upright bars because they would interfere with mine. Can't win.