Noun
someone who is attending a party
Source: WordNetthe hall was crowded with an overflow of partygoers Source: Internet
A male partygoer upped the ante and downed his pants, displaying plenty of cheekiness to police. Source: Internet
Suing over spilled champagne: Lawsuit is filed against Jets player Lorenzo Mauldin for 'punching Manhattan partygoer in the face because he dropped his drink on the linebacker' Source: Internet