... and set up a store within a store selling your coffee while you loiter and use their internet. Sounds like a business plan!
I have a friend is a professional troublemaker, back when Starbucks Baristas were yelling at people with some political slogan. He got the bright idea to go in and order the stickiest sweetest coffee drink they had and they yelled at him and he jerked at the yelling, dropped the coffee, spilled it all over the floor, and they did give him another coffee (as he profusly “apologized”)...but they didn’t yell at him a second time and they had to come clean up the mess.