I think this would go more in the newbie or opener thread bro... but anyways in my opinion its ok as long as it AIN'T that one drunk girl that is barely able to walk yet is all over the place blurting out nonsense/ getting on top of tables and dancing/stripping/ throwing up/ etc. Because come on... that is sad!
as far as how to open, I would go with the normal opinion openers or any other type for that matter. Usually girls lower their bitch shield when they are out having fun in the way that you describe. Once you open what I would really recommend is doing some cold readings, they will get more excited about what your feeding her than usual.
truthfully though I prefer them sober (or at least not fully under the influence) just because you get to know/see who they really are... rather than getting to know their captain morgan side.