@TomInHo Definitely. Instagram seems real good as a marketing (passive sales) tool. It's a different application than the one I'm field testing, but since I've made a decision to put some effort into my instagram, it should work in the way you described.
Oh my bad
I misread your initial post. Now I see what you meant
Sure you can exchange IG with your target when you meet in venue. This is actually a good idea in general so you can stay in contact and meet later that same night while you work other girls
But like I said with my friend, even though he shared his IG, I don't think that was the only thing that did the heavy lifting for him.
They were already attracted, and seeing him talking to other girls is what probably helped his social proof
Them coming back to ask about his IG could have been just a way to make converstion
But anyways there's no harm in field testing it for yourself and seeing what happens