I thought about doing this, however my question is, "How did people feel overall mixing drinks and all?" did many people get sick by end of the night?
I was looking at making it a simple drink what you had in front of you, rather than making each drink correspond to something.
I'm not even sure I'd call this a variant. You're not playing the game any differently. As for people who don't want to mix drinks, you can always change it to units. For every N alcohol you gain, drink N units. Be it seconds or sips or whatever.
Whenever we play, I break out my steins. EVERYONE GETS A STEIN. Turns out I own a lot of steins.