I like that she shows initiative, it's a little flattering, she shows herself as outgoing, we have a good chance to make a connection and it establishes a baseline level of interest that sometimes isn't there when things go the other way. I've taken a lot of girls out who basically said yes because they didn't want to say no. That always turns out to be a waste of time.

It doesn't even have to be a holler, just give me some sort of clear-ish sign rather than being standoffish with your friends or burying your nose in your phone all night. Just be a little loose, a little outgoing, show me a little interest in some subtle way.