Awesome! Do you like get a buffet or order from a menu?
Awesome!  It's going to be one of those serve-yourself buffets, so grab lots before the inlaws start digging in!
I adore brunch.  Best options for a meal, in my opinion! That's nice! Brunch is usually served between 11AM to 3PM. Do you have alcohol with yours? Not usually, is that normal? Yes, usually champagne or some sort of cocktail. Great choices.  I can only think of bloody marys as drink options?  I know I am forgetting others. I don't know specific drinks, but I know usually the food is breakfast foods like eggs, bacon, or fruits and such. Do you have a preference? Not, really, they all sound great! I like to get brunch at restaurants, too.
Such brunches are often serve-yourself buffets, but menu-ordered meals may be available instead of, or with, the buffet.