The phrase "attended lunch" is correct and usable in written English.
It can be used to indicate that someone was present at a lunch event or gathering.
Example: "She attended lunch with her colleagues to discuss the upcoming project."
Alternatives: "was present at lunch" or "joined for lunch".
They attended lunch with Kiplagat later in the day.
"It's what held this town together, all the mills," Ms. Flaherty said, watching another thinly attended lunch hour go by.
At the time, Dragon Capital's website said: "Dominic Scriven OBE, CEO of Dragon Capital, attended lunch with the prime minister and also accompanied him to the stock exchange and other important meetings".
Following time-honored rituals, the Obamas attended lunch with lawmakers in Statuary Hall at the Capitol, then rode and walked to the White House, where they watched the parade from a bulletproof reviewing stand.
He was an unabashed royalist, and made no secret of his pleasure in attending lunch at Buckingham Palace with the Queen and the Duke of Edinburgh.
Nieves' fundraiser starts at $25 to attend lunch only, and costs $100 for those wanting to eat and shoot.
Through the program, young women are given the opportunity to attend lunch time discussion groups, retreats, and guest speaker events addressing topics like life after graduation, how to have successful relationships, and financial planning.
She has inquired about families, discovered mutual friends and issued a flurry of promises to attend lunches and brainstorming sessions.
Partly based on information from a whistle-blower at Her Majesty's Revenue and Customs, the British revenue department, the report paints a cozy picture of tax officers attending lunches and dinners with company officials while negotiating tax deals.
Through it all, Dr. Singer has managed to settle in, giving lectures, attending lunches and dinners and -- between e-mails -- considering humanity's larger questions: life, death and free trade.
Good examples for you to mirror would be this year's Brie Larson, Leonardo DiCaprio, Alicia Vikander and Sylvester Stallone, who all have been seen relentlessly promoting their films on red carpets, mingling with Academy voters, attending lunches and gathering goodwill from everyone.
