To go out to dinner or a show with someone, I used to use BegForDate variation of this principle.
from http://baron.vc/
Quote
...ADVERTISERS
BegForPost is an automated system that takes the burden out of having to directly contact bloggers to have your product, service, or company promoted.
BLOGGERS
Find interesting topics and companies without having to sift through thousands of emails from Web 2.0 founders begging to have their lame-site plugged.
PUBLISHERS
Sorry, you're the "middle-man" and you have been eliminated. We have no API and prefer to work with bloggers directly....
from http://baron.vc/