I'm pretty much share your attitude about dance floor pick-ups and not wanting to be exclusive. Mainly because I wouldn't of had a chance to chat to them much / build enough comfort on the dancefloor. Therefore skipping too many steps for a non awkward day 2.
Either hers or yours is good, whichever she seems most comfortable with. If it comes down to it, be honest and do tell her your not looking for a serious relationship at the moment but you'd like to hang out with her and have fun. Before you meet up just make the conversation as suggestive as possible to 'warm' her up before you meet. Good luck
