It seems to me people who do drink, even if only occasionally, have a harder time justifying to themselves why they shouldn’t drink when the opportunity presents itself.
My point is that it's not a big deal socially in my experience.
That says nothing about why they have trouble abstaining.
One element of it: teasing, judgement. Sometimes you fear those reactions to your decision so you pick the easy path and avoid that type of interaction. I know it sounds silly.
And you may also fear the broader possibilities when someone asks you why you are abstaining. Lots of people do.
I think a lot of it has to do with how you turn down a drink. I usually say, “No thanks,” or “I’m good, thanks,” and it rarely goes beyond that. When I hear people respond with, “I don’t drink,” or “I’m not drinking right now/tonight/this month,” that seems to invite discussion.
Everyone’s experiences are different though and I’m painting with a broad brush.
Otherwise - to your question, very circumstantial. Unsurprisingly, the more bro-like the setting, the higher the chance. I don’t surround myself with that environment but it’s there from time to time.
This idea partially drives the demand for "Death Water" where they're not really selling water, but rather, an aesthetic.
Singling yourself out in a group can be uncomfortable.
Obviously if people are drinking these because they just like the taste, that's fine, but I think most people have these because it lets them look like they are drinking.