how many girls in bikinis will fit into a rent-a-john?

This is a mix between a nightmare & a dream. Dream = being only guy crowded into a very tight space with about 10 girls in bikinis. Nightmare = tight space is a portable toilet on a hot day at a festival... followed by half a dozen dudes following the chicks into the stall. If I were a bystander, that rent-a-john would have been tipped over while the door was locked shut!