Well, I often see dudes getting slapped or sometimes even pepper sprayed by chicks in the bars/clubs when they try a line like that one.
er, I would think that line wouldn't work very often, it's way too obvious and the only women I'd think you'd get who'd actually fall for it would have IQs near the single digits. I mean, wouldn't they at least just ask the guy to whip it out for them before agreeing to go on a date or something?
The point I was making, as dumb as it is, it's more genuine and has a more realistic chance of working than the crap the character pulled in the episode.