The whole main cast of Spamalot + what they would drink at breakfast during mornings (no matter how anachronistic it is :P)
Well, if we’re being historically accurate here, they’d most likely wine or ale to drink at breakfast XDD Or maybe some sort of cider. BUT you said this can be anachronistic and hell, it’s Spamalot and Lancelot is drinking a martini in “Knights of the Round Table” and I don’t think they had martinis in 932 AD.
Arthur: I feel like he would drink coffee? I mean, how else would he deal with his knights and ruling a kingdom? But I feel like he really wouldn’t drink his coffee with much milk or sugar or anything. Just black coffee.
Lady: Coffee as well but with cream and sugar. But I feel like she would like orange juice with pulp.
Patsy: Oh, Patsy’s a tough one. I feel like maybe orange juice? Orange juice with pineapple because I headcanon he likes tropical-tasting drinks.
Galahad: Mimosa, champagne and orange juice because he’s a knight now and he can drink fancy if he wants too. Or maybe like wheat grass shooters?
Bedivere: Milk. Plain milk.
Robin: Lemon-tea. Maybe it’s for his vocal chords?
Lance: Protein-shakes. Like, the intense ones that body-builders drink with egg and flax-seed. It makes Herbert want to gag seeing it, but hey, it’s clearly working?
Herbert: At first, I was thinking strawberry milk or something like this. I could also see some sort of tea as well - some sort of fruit tea like peach or pomegranate?