Alaric's bachelor party was an event organized in I'd Leave My Happy Home For You before his and Jo's wedding. The party coincided with Josette's bachelorette party.
Season Six[]
Damon, Stefan and Matt kidnapped Alaric from his classroom and threw a party for him at the Salvatore Boarding House. Alaric also talked to Damon also talked about his and Elena's plan to take The Cure together. Tyler and Enzo later joined the party. At one point of the party, Stefan left to talk with his mother at Mystic Grill. Matt advised Alaric to leave town if he wants to survive.
Later Damon and Stefan managed to overcome Lily.