a bit late but since enstarstwt is sort of on the topic of how the cast would hold their drinks, What do you think? I feel like Ritsu can either drink 14 glasses and be fine or can't even drink a sip without throwing up. Mao would be interesting cause i really don't have a clue. Sena probably is a lightweight. Subaru can drink out really well + Hokuto makes it into a competition.
i'm totally down for the theory that ritsu would be an undefeated drinker and yet he'd act like he's super drunk just so that people would spoil him, like i can totally imagine him going "maa~kun, carry me hooome, i'm soooo wasted weep weep" but being absolutely fine to walk on his own. at the same time, i don't see him as someone who'd enjoy drinking that much, like he probably just drinks socially at parties and stuff but if he can he'll avoid it?
for mao, i feel like he'd be the guy who can hold himself fine for one or two drinks but get tipsy pretty fast, with flushed cheeks and maybe sleepy? izumi probably doesn't drink bc he thinks it's bad for him, that will cause headaches and leave him bloated, etc. subaru and hokuto... yeah i can see that happening and makoto trying to remind them they have an image to keep lol
i also have a headcanon that niki, despite his stomach made of steel, would be super lightweight and become the clingy "i love you guys" kinda drunk and rinne would...