Ok so this drives me crazy, happens often. Last group dinner with five families, we arrive, on time, one of the families (with teenagers) has already ordered dinner because they were starving.
So everyone ends up eating at different times and it’s just feels weird.
If young children need to eat straight away I get that or if teenagers are starving why not get a starter or something to share to tide them over until everyone arrives and dinner is ordered.
And if people are late then yep tough you don’t have to wait for them!