The cops always used to hang out at the Starbucks I used to work at years ago. We never charged them for their drinks and regularly gave them a book of free coupons to take back to the station.
I noticied the cops in San Jose hang out at Starbucks. We went there after a play and the cops were queue up along the curb.
Never felt more safe getting a cup o' joe (just the regular kind) at 10PM.