Party Girl Party Boy

Party Boy or Party Girl (depending on the player character's gender) is a perk added to Fallout 3 with the Broken Steel add-on and Fallout 4.

Fallout 3
The player will no longer suffer the withdrawal effects from an alcohol addiction.

Fallout 4

 * Rank 1: There's no chance you'll get addicted to alcohol.
 * Rank 2:
 * Rank 3: