One user inserts a coin, then the next user tells what comes out of the vending machine that was used or has to do with Gossip Girl that the user before gets. Then that user inserts a coin and so on.

Example:

Lala: $Inserts coin$

Lili : You get Chuck's Scarf
$Inserts coin$

Lulu :You get A kiss from Nate
$Inserts coin$

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$Inserts coin$