A) Get you AND your girlfriends in club/lounge/event for free or pay for you all.
B) Get you AND your girlfriends into VIP.
C) Supply drinks all night for you AND your girlfriends.
Yes you end up annoyed all night and the guy acts as a major c*ck-block and you'll have to comprise a way to artfully dismiss him at the night's end, but at least you're tipsy and you're friends will thank you later because they are having a blast.
PAYING IT FORWARD.
take one for the team A.K.A.:
Took one for the team.
Taking one for the team.
Taking it for the team.