FMIL is hosting our rehearsal dinner, which will be a cook out at our venue. Rather than host a full bar, we wanted to pre-order a set amount of beer and wine to have available for our RD guests, so that we are considerate of her budget (She will agree to spend anything, but we know her finances are tighter than she lets on.)
The rehearsal dinner/socializing will last about an hour and a half and we expect between 35 and 40 guests of drinking age, almost all of whom are light to moderate drinkers. We'd likely do two types of beer (one lighter and one darker) and two wines (one red, one white). Guests would be about 60% beer drinkers and 40% wine drinkers (best estimate).
How much do you suggest we order so that guests have enough to drink but we don't have tons left over?