Closing is when you get a physical close such as a kiss or a number close where you get the girls number.
this can be done in mid conversation
my last close HB 7 went like this:
(after talking about what we do, how we know certain people of the social group etc)
Me: so do you hit notts town often?
Her: Yeah, im at uni so weekly basis really
Me: Oh okay cool, you should give me your number and i'll let you know when im next out...
*She gives me her number*
i give her a kiss on the cheek (friendly) and leave because my last bus was about to go.
Shes met "Mr sociable" and "Mr comfort" she'll meet "Mr seducer" soon
Read Richard la ruina's book. Its great.