Afterparty

Bachelorette party

Celebration

Celebratory

College

Counterparty

Festive

Festivity

Fete

Fiesta

Hen party

House party

Housewarming

Intraparty

Jamboree

Multiparty

Nonparty

Party

Partyism

Partymaster

Partyness

Preparty

Shindig

Social

Stag party