Calling all theobromine freaks! Okay, so that's not the best rallying cry for the Ghirardelli Square Chocolate Festival. But any chocoholic knows that cocoa can be a mild antidepressant and a sexual stimulant, and for that we thank theobromine, the active ingredient in chocolate. Get your fix for 50%... (show more)

Calling all theobromine freaks! Okay, so that's not the best rallying cry for the Ghirardelli Square Chocolate Festival. But any chocoholic knows that cocoa can be a mild antidepressant and a sexual stimulant, and for that we thank theobromine, the active ingredient in chocolate. Get your fix for 50% off when you buy today's deal for their 15th annual festival, which will be held on September 11th and 12th. Today's $10 voucher buys you 15 samples -- chocolate-filled, chocolate-covered, and chocolate-flavored everything -- from around 40 Bay Area vendors. Time your visit with a chocolate-themed event or demonstration, like cocoa buff Scott Broccolli's tutorial on barbecuing with brown bliss. How's that for hot chocolate?