When I've had a drink, then I'm much less subtle. I'll be giggly, fiddling with my hair, sitting closer to them, leaning closer, laughing at their jokes more obviously, giggling, giggling and more giggling lol.
When I'm not at all tipsy, I don't show much affection; I find it difficult. Though I'll try to flirt with the ocassional dirty joke or something, just to get the convo moving in a more provocative direction... lol.