A little risque, but I think it is ok.
Two men loved playing squash. One join a newly opened sports club, and invited his friend to have a game as his guest. When the game ended, the member checked his cell phone, found an urgent message and had to leave. The guest stayed on the have a shower. The club was almost deserted, and the guest got lost, and went to the ladies locker room. He found a towel, got undressed, and had a shower. Just as he finished, 3 ladies walked into the shower room, and the situation was, shall we say, a little awkwark. The guest wrapped the towel round his head, leaving a slot for his eyes, and marched out of the room.
The ladies were a little surprised. When they recovered, the first one said "Well, it was not my husband". The second said "Nor mine either". The third lady said "He wasn't even a member of the club".