system
A chat on subreddit /r/NoStupidQuestions
human
Yes.  There are no laws in the US that limit drinking to 21 even when abroad.  So if you were to visit Belgium for instance, you could drink beer and wine from age 16, or any alcohol from age 18.
gpt
And most other countries don't ID with the same strictness as the US so it's easy to drink if you're underage there too