Sometimes if Starbucks is nice, you'll get free water, that's only if they're nice. The water comes in a nice clear plastic cup, with........free ice. Yes, that's right folks, free ice.
I dont carry in Starbucks, since I dont own a pistol. When I ever own a pistol, you'll bet I'll designate a gun just for Starbucks, probably like a Carbon-15 with the Starbucks logo on it, and like 6 mags in a chest rig under my large leather jacket, and like 2 in each big pocket in my pants with many pockets.
I'll even show the clerk and be like "look, this is my Starbucks gun!11" and then when she utters an awkward "oh....OK...." and then picks up the phone to call the cops, I pull out my copy of the Constitution I carry everywhere, and flip to the second amendment to show my legality, give her 2 silver pre-65 quarters for my drink, then leave and get in my car fast, evading jail time.
Sorry, your intentions may have been good, but with a title like "what do you carry to starbucks," people will at least go "***?"
I'm sure most people just carry whatever gun they carry everywhere else if they ever go to Starbucks.