While these types are important - we all know its the aggressive early drinker who really sets the mood. Often found bugging people to 'shotgun' or take shots with them, they're often unsuccessful and left to fulfil their conquests alone..
While he eventually finds his way to a bed or bathroom, you'll always start to see that one group who park themselves at the Beer Pong table. They know every drinking game rule under the sun, and are intent on staking a claim of masculinity by going 10-0 at Beer Pong. They'll perch there for a good few hours, before eventually 'giving up' the table to go and rest their throwing arm before the party that night.
So you have the chillers, the drinkers and the dancers. By this point, the parties in full swing.
Everyone's feeling it and having a good time, which is exactly when The Selfie Patrol come out in full force. Always have your wits about you, because these guys will be snapping you at your worst angle before you've had a chance to smile.