Hi
I manage a social life by shifting my 5-hour eating window from my preferred 2 - 7 to earlier (e.g. 12.30 to 5.30) for a social lunch or later (3 to 8) for a social dinner. I would not eat later as I always hated eating late. I would switch to sparkling water in a pub/restaurant from 8 pm if I was at a dinner.
I have someone staying with me, if we are eating out in the evening I have a black coffee with her while she has a light lunch, or vice versa.
Conferences or full board holidays would,be tricky. I am retired, so conferences are not an issue. If someone else was paying e.g. employer, I would eat a lot at one meal and have some snacks with me e.g. boiled eggs, nuts, babybels, dark chocolate, to "top up" within 5 hours of that meal. The full board holiday more of a problem. I would resent paying for the meals I do not want. If an English company I might try negotiating a reduction, e.g. on the basis of no breakfast. If lunch was fairly informal e.g. packed lunch to be eaten out, I would take it and eat it at a time to suit myself - similarly with buffet lunches where you can sneak out stuff in plastic containers, discreetly!