A party is a sexual encounter involving at least three persons who want to have sex with new partners or in the presence of other people. There are many kinds of parties :
Dana during a sex orgy. An Orgy involves many partners who have sex together.
Vanessa getting ready to be fucked by five stallions. In a Gangbang, several men submit a single lady to their sexual pleasure.
The more engaged in a threesome with two men.
Candaulism is a sexual game in which a husband offers his wife to another man and takes pleasure in looking at them fucking.
Sometimes, Mardi Gras is one big long party.
Looking for a stallion is a candaulist game : when the woman (here HotBlondeWife) has found a seductive man, she has sex with him while her husband looks and takes pictures.
Girls in their twenties before a party. Many students discover groupsex at the university.
Holidays centers are the right place to make friends and to try swinging or groupsex.
A Bachelorette Party is held for a woman about to be married. It may end with an orgy, as the girls often go to strip clubs and are drunk.
A bisexual swinging party
Sex clubs organize costumed parties. These pretty girls already look aroused before the party begins. Sure they will be fully nude soon...
Strip poker : players remove their clothes when they lose. Often, when a girl is finally nude, she gets fucked by the other players.