SHORT QUESTION: Met a girl who seemed interested - add her on Facebook TONIGHT or TOMORROW?

stanleman
Met a girl today while I was hanging out in a group. She seemed obviously interested: catching her looking a lot, flirty smiles, long eye contact and smile at the end. COuldn't ask for number due to group situation but I'm going to add her on Facebook (she told me her name when we met).

Wondering whether I should add her tonight while the conversation is fresh, or tomorrow where I might look more "cool" but she not remember me as well?
Tonight
Vote A
Tomorrow
Vote B
Select age and gender to cast your vote:
GirlGuy
SHORT QUESTION: Met a girl who seemed interested - add her on Facebook TONIGHT or TOMORROW?
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