The phrase "a party for which" is correct and usable in written English.
It can be used when referring to a specific event or gathering that is associated with a particular purpose or reason.
Example: "We are organizing a party for which everyone is invited to celebrate our team's success."
Alternatives: "an event for which" or "a gathering for which".
She was humiliated when only nine guests came to a party for which she had sent out ninety invitations.
Zubov is a member of Just Russia, a party for which I voted, as did many of my friends in December 2011.
Here is my view from 13,000 feet: You liked these folks well enough to give them a party (for which they absolutely should have thanked you, but didn't).
The writer's head is mobbed with characters, images and language, making the creative process something like eavesdropping at a party for which you've had the fun of drawing up the guest list.
28 -- Prosecutors show the jury a videotape of a $2 million weeklong birthday party on the island of Sardinia for L. Dennis Kozlowski's wife, Karen a party for which Tyco paid half the bill.
But when a party for which he has supplied the entertainment is descended upon by armed assassins, he becomes caught up in a drama that eventually includes the Mafia, the Red Brigades and the Italian government functionaries who are fruitlessly negotiating for Moro's release.
On his last birthday he created a controversy by giving a $2 million party, for which he flew approximately 1,000 guests to Tangier.
The roughly two-hour dance-theater work was created with physicists and presented in two parts: a conventional opening performance on the stage, and a tea party, for which the audience was brought onstage for chocolate cake and guided conversation.
Once again, Marji notes, it's the poor who suffer: while Marji attends a "punk" party for which her mother has knitted her a sweater full of holes, peasant boys her age, armed with plastic keys promising them entry to paradise if they are killed, are being sent into battle in Iraqi minefields.
The following evening, he had a dinner party for which he "copied" the Nico at Ninety meal.
The Books of The Times review last Monday, about "The Memory of All That," a memoir by the actress Betsy Blair, who was blacklisted for her leftist views, misstated the name of a political party for which she once worked.
