The phrase "a launch event" is correct and usable in written English.
It can be used when referring to an event organized to introduce a new product, service, or initiative to the public or specific audience.
Example: "The company is excited to announce a launch event for its latest smartphone, which will take place next month."
Alternatives: "a product unveiling" or "a release event".
Speaking at a launch event in Nairobi, Cyvette Gibson, the mayor of Paynesville, described her city's "significant challenges".
"People would complain if the BBC battled ITV with this capitalist attitude," said Faith, speaking at a launch event for the show.
"If we were about photography we'd be built into cameras, but we're not, we're built into phones," said Systrom at a launch event in New York today.
"The empire strikes back," proclaimed Heinz-Jakob Neusser, as the two models rolled onto the stage at a launch event during the media-preview days in Frankfurt.
Elon Musk has reportedly personally cancelled a "super rude" customer's Tesla Model X order after he complained about a launch event for the car in an open letter.
Labiofam spent 18 months working with a French company, Robertet, to formulate the scents, uncorked this week at a launch event in Havana.
When he pulls together an "interesting bunch" of friends to storm a party or a launch event, he charges a neat sum of money.
Meanwhile another teen author, Alan Gibbons, also hit the headlines appearing alongside the mother of Sophie Lancaster, in a launch event at the murdered woman's Lancashire school.
Cassette Day's backers have already booked a launch event at London's Rough Trade East, with others set for California, Brooklyn and Tokyo.
NB: The Media Society is staging a launch event for the book at the Groucho Club on 23 January at which I will discuss the book's themes with one of its editors and contributors, Ray Snoddy.
McDonnell, meanwhile, helped set up meetings for Williams with state health officials, appeared at promotional events and hosted a launch event for the dietary supplement at the governor's mansion.
