Weiss smiled politely. "Why, Ruby?"
"Because I've never done it before with you! Yang gets drunk with me sometimes and makes fun of me for saying weird things. I'm not a people person, y'know. But I want to drink with you and see what happens." She wandered merrily over to her stereo system and clicked a switch. Rock music erupted from the speakers—it wouldn't have been Weiss' first choice of atmospheric accompaniment to the evening, but Ruby had the good sense to keep it quiet enough that she could easily tolerate it.
"And you want—me to join you in this endeavour?"
"Yes. If you want to. I just want to see where the evening takes us. Won't you have some fun with me? You don't need to worry about tomorrow; just sleep here and I'll look after you if you're groggy."
Weiss had a vision of herself lying in Ruby's bed with a sentimental smile on her face, her girlfriend carrying in—oh, perhaps a tray of muesli and a pot of tea, reassuring conversation that escalated into hair and then face stroking, hot, gentle kisses and a warm embrace that relieved her weariness. The thought made her flush, and she found herself nodding.
So it was that Weiss had another glass of champagne, and then an additional glass of wine, and found herself quite tipsy—but it was okay, because Ruby was too, her pink face pinker than usual, her smile wider, and her voluble nature exaggerated.
"…so Yang called Uncle Qrow over to play, and he beat her too—so hard it was embarrassing. And that's how Yang and I became the most respected Yu-Mi-Go players in school." Ruby smirked and Weiss snickered, realising as she did that it was incongruously unladylike and retreating quickly into an embarrassed smile.