I have only taken two long-haul flights in my life, which were an Air France round-trip between Paris and Osaka, so I have limited experience with those. On the first one of these flights, I saw a passenger head to the galley and pour themselves a drink. And ever since then I've been wondering: is this acceptable and/or normal? I'm asking both in terms of "general passenger and crew expectations", and airline policies and regulations.
There were no flight attendants in the galley at that time, and there were no doors or curtains to block access (or if there were curtains, they weren't drawn), so I didn't think too much about it at that time, but I'd still like to know.