I've used the dayuse app several times to book rooms for ~10-~3. I always check out in person to be sure there's no misunderstanding about when I was done with the room. The other guy has sometimes been standing there with me either at check-in or check-out or both, and none of the staff has even blinked an eye. They've handled the check-in and the check-out in a purely professional/business-like manner. No awkwardness at all.