More than a 1,000 tour operators from around the world have converged on San Francisco this week to talk shop, meeting with some 3,500 exhibitors in an expo that is expected to generate more than $350 million in tourism revenue for the city, AsianWeek reports.

San Francisco is still “one of the most well known and exciting destinations on Earth,” says the U.S. Travel Association in material promoting their annual international travel ‘Pow Wow’ going on through Wednesday at the Moscone Center.

In 2010, 15.9 million people visited San Francisco, spending $8.3 billion at local businesses and bringing in $485 million in tax and fee revenue to the city.

The event is sponsored by many of the usual suspects: the SFO airport, Alcatraz Cruises, Pier 39; all working together to ensure a steady stream of travelers consuming the city’s abundant supply of sourdough bread and Golden Gate Bridge key chains.

This year’s expo, the largest of its kind in North America, has attracted delegations from over 70 countries, including a record number of Chinese delegations—120—who will be met by 25 Mandarin-speaking volunteers, acting as interpreters and guides.