Sometimes the meet and greet was enough, and we'd shake hands and one or the other of us would say, "Nice meeting you, but I don't think we have enough in common."
Sometimes if he asked me out again, I'd say it then.
I had a three date rule: If I didn't feel some kind of connection or appeal by the third meeting, I would turn down another date. Sometimes I didn't have to: sometimes HE didn't call again.
I had about 31 meet and greets, few second dates, third dates I could count on one hand.