Personal Headcanon for alchol tolerance of the boys.

Bi-Han and Kuai: Zero alcohol tolerance. Cyromancers and alchol don't mix.

Smoke: Medium tolerance. He can take a few but he'll end up on the floor if he drinks too much.

Sektor : Does not drink because it fucks with his ability to operate normally. Hates the taste so good luck getting him to drink.

Cyrax: High alcohol tolerance surprisingly but you won't know because he doesn't drink often. Is definitely the one who drives everyone back assuming Sektor doesn't feel like it.

It seems we have a similar idea for Sektor, as the one that doesn’t mix well with alcohol (I like to imagine the alcohol makes him too emotional and thus vulnerable which is why he hates it so much, beside the general low tolerance to begin with).

However, my personal headcanon about Bi-Han, Kuai Liang and Tomas is totally opposite to yours. 

For cryomancers the first sips of alcohol may not be the best experience due to the sensation of “warmth” but that is a deceptive feeling, as alcohol leads to lowering body temperature and I like to think that is something pretty cool for cryomancers. Because the more chilled out the body is they feel much better and have annoyingly high tolerance however by rule, Bi-Han and Kuai Liang are not allowed to drink much on missions. Their body temperature naturally is low for a normal human being and while drunk, from medical standpoint, they easily could pass as a walking dead, because their body temperature drops to the level that should kill any normal person. So they aren’t allowed to drink much to not rise the unnecessary and difficult to explain doubts.

As for Tomas, sorry guys, but I’m here for the high tolerance of Slavic blood! Even if the stereotype may be harmful, damn it, I want Tomas to be acknowledged as of Slavic origin and in my head he is another Lin Kuei with annoyingly high tolerance for alcohol, especially compared to other members. May be a bit reckless while drunk and be hangover-ish if he overdone the drinking but a few drinks won’t defeat it!

Cyrax in my head is always relatively normal compared to everyone else. Most likely better than average human being with alcohol tolerance but not even close to beast like cryimancers XD