I pick-up can take 10 seconds as my brother was in a club at like 2am and a random girl grabbed his ass and he took her to her flat and F-closed her.
and I had wasted all that time in the earlier pub trying to talk to a girl while him and my "mate" ruined my confidence by saying "well, looks like we're staying here all night then

" just when my target was speaking to me.
I think it all depeneds on the buying temperature, if a girl has been hit on by othre guys and they make her attracted, then that can switch rto another guy at the last minute.
Someone in "the game" said the average woman takes 7 hours to be comfortable with having sex with you