If you actually want to make out flirtation is usually the way to go.

I guess it depends on what your long-term goals are.

Hooking up within seconds of noticing each other is not that uncommon in certain venues, and I haven't noticed any downsides to that.¹ (My inner Umesh says this just means I don't do that often enough, and I guess he does have a point, though I don't know whether it's relevant.) Granted, that's unlikely to result in a relationship, but that's not what drethelin is seeking anyway.

1. Unless you count the fact that you are standing, which if the other person is over a foot shorter than you and your lower body strength and sense of balance are much worse than usual due to tipsiness, tiredness, severe sleep deprivation and not having exercised in a week, can be troublesome if you don't pay attention to where your damn centre of gravity is.