So to celebrate, here is a bit of advice from Ellen Peck's 1969 long-titled text How to Get a Boy and What to Do With Him When You Get Him. Not that we would know anything about that. Partygoing Party behavior is an exaggeration of real behavior. People let themselves go.
Flirts become more flirtatious.
And, because they get scared by all the action, mice become mousier. Don't be a mouse. If you do have to get sunglasses tomorrow, you can say so. But make the sunglasses comment more FUN by exaggerating a bit. Exaggerating things is just one way to be flirtatious.