Never mind the biggest issue, I still can't see it is even an issue. Where I lived at the time, my street had a street party! There was a DJ, everyone got hammered, at one point two fellas had a tear up, and the police turned up and didn't seem to have a problem with it. These are people that do not interact daily as part of their work.
Xmas 2020, I can't remember what the crack was with lockdowns or tiers etc but I organised food and drink for all the depts with staff in the office. Only rule was they had to stick to mixing with their colleagues and not be socialising with anyone and eve