Not really dating, but once, back when I was in college, a girl invited me up to her room to study. I declined, and asked if we studied at Kramer instead. 
Yeah, I do this stuff all the time. In retrospect it's clear that I've accidentally passed up sexing someone. The worst was when I accidentally passed on a threesome because I thought the girls were just joking. Yeah, I regret that.
Another time, I was flying on a Russian airline to Russia in the 90s and a hot stewardess asked me if I was American, and then asked me to come with her up to the cockpit "to meet the captain." I thought I was in. Turns out I really did just meet the captain.
Apparently I suck at reading signals.
