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For those of you not terrified of the inevitable machine takeover, BarBot -- an annual festival of cocktail robotics -- is happening this weekend at SOMArts (934 Brannan St). Robots will serve you drinks and chat with you while competing against each other -- and some human bartenders, too. Advanced tickets for both nights of the event are sold out, but you can enter to win some here or try your luck at the door. Who doesn't want to have a few drinks before bowing to our new metallic overlords? [BAS]