Im partial to:
" thats a nice shirt, it would look better on my floor"

Funny.  How bout " You must use windex cause I can see myself in your pants."

Dont think that one works.

maybe

You know, you might be asked to leave soon. You're making the other women look really bad.

another doubtful one.


Disclaimer I have never nor will I ever use the above lines on any one at any time any where.  

You must be from Ireland, cause when I look at you my penis is Dublin!

Really bad

I'd like to suck on your cl*t until your tits collapse.

Much as that's a true statement sometimes, I just don't think it would work in a social setting.

I think I'd like to fuck your brains out... But it doesn't look like you've got any !

I’m no Fred Flintstone, but I sure can make your Bedrock

I guess a blowjob  is out of the question then