"You can't take the day too seriously if you're in a meeting with somebody wearing a fake mustache, " says Mr. Gebbia, who often participates in the company's Mustache Monday.
He is organizing the next National Beard and Mustache Championships in New Orleans in September, where people vie in various facial-hair matches such as best Dali mustache or freestyle beard.
"Personally, I'd be suspicious of a Turk who couldn't grow a mustache, " said Cengiz Altug, a salesman from Istanbul who has worn a bushy mustache for 35 of his 56 years.
