I think the 'what are you doing later' would come off as contrived if you asked this at the very end of the night.
I read a story about Bruce Willis a while ago; apparently his go-to pick-up line when he was at his prime was, 'So, what are you doing about sex tonight?'.
I read a story about Bruce Willis a while ago; apparently his go-to pick-up line when he was at his prime was, 'So, what are you doing about sex tonight?'.