SO I ASKED AND YOU ANSWERED... Most of you said that three guys was the absolute maximum that the restroom would hold, and you're not exactly wrong. The restroom holds either 2-3 strangers, 5 friends, or 10 homies. I especially like this response from @FoxedMemes, which says "Well, technically, as long as no one’s using one, there could be as many guys as can fit." @ein_meme_lover wasn't wrong either when he said "3 stright dudes 5 gay guys"
Anyway thanks for participating in my experiment. Have a good one!