"business event" is correct and commonly used in written English.
Example sentence: My boss asked me to attend an important business event this evening.
It had been a social business event.
He had been invited to Lafayette to speak at a local business event, the ABiz Top 50 Luncheon.
If I've sent an e-mail invitation to a business event, it doesn't surprise me that many people don't reply.
The struggle for control of the company has become the most closely watched business event in Britain in recent weeks.
Virginia claimed that she met Trump one more time, about five years ago, at a business event.
"But this is really a business event, primarily for studios to show theater owners what they have on their slate for the third quarter and beyond," he continued.
Her most expensive claim during the three months from January to the end of March was an £84.21 business event – presumably a lunch or dinner – in February.
He's been working there since last October, though his change of career began in 2007 after a business event in Bali, when he felt his attitude shift.
Rick Ridgeway, Patagonia's vice president of environmental initiatives and co-founder of the Sustainable Apparel Coalition, was in Melbourne recently for a business event.
The past few years have been challenging for conference organizers, with the economic downturn, health concerns about outbreaks like the H1N1 flu virus and public backlash against anything that looks like a lavish business event.
