Fratonising with the SLF - please, as if!
Seriously though - I'm sure some would be flattered to be asked on a date (strictly outside of work) however you will have to be travelling in at least J class and make an impression without having pressed your call bell once.
(okay not completely serious)
I know some hosties who met their one and only man in flight - Personally I just ogle the good looking ones and spit on the ugly ones.