You mean like have "I would like to buy 10x, 20x, or 30x beers", so that you don't have the keep pressing through the dialogue over and over and over... and over?
If so, sounds great, and this could also be applied to the dialogues for other parts like Gamma Gulp Beer (in Gecko), Cigarettes (In Junktown), Nuka-cola (Junktown), etc.
Edit after reading other posts:
No, this would just break game balance. 8 beers * 5% DR = 40% DR + Charisma bonus, making even a slaver alt only have to have 1 Charisma....