San Francisco-based Yelp has expanded its Phoenix offices with its Eat24 support team. Yelp's Eat24 food delivery service — which is offered in more than 1,500 cities and includes more than 30,000 businesses, including almost 500 in the Phoenix area — needed to expand its customer support beyond its San Francisco office, said Dale Sahs, head of Eat24 customer support. "We're pretty much running out of space in our San Francisco headquarters, but it's also to enhance our business continuity…