> but IIRC he abstains from alcohol.

Just like everything else he says, that's a lie.

Trump:

> I'm not a drinker. I can honestly say I never had a beer in my life…. Whenever they are looking for something good, I say I never had a glass of alcohol.

Laraby, bartender at various 1990s clubs:

> I served him. And he drank at the bar. He'd come in with John Casablancas. He'd go to the side of the bar [at Spy] by the waitress station, because he liked the waitresses. He would order light beer.

Ault:

> We had champagne on the table, always, and we had vodka usually, some scotch. He was drinking champagne or vodka

Laraby:

> Trump was not a good tipper at all. He would stand at the bar, and if he was paying, which he sometimes did, John would have like three drinks, and he would have his beer and then they would get their bottle of wine, and the wine was expensive, and then he would leave me, like, two dollars.

https://www.vice.com/en/article/zmp7qe/does-donald-trump-drink-alcohol