Fair warning, if you're brewing coffee at home it's still possible to buy Starbucks.
Most of the coffee at Costco is just rebranded Starbucks beans. A lot of dark roast coffee is secretly shitty Starbucks beans. If it smells like cigarettes at any point, you've probably got Starbucks coffee.
The only reason i would go to a Starbucks is to look at the people working and buying coffee there. Or to meet a cute person behind the counter, but i have never nore will i spend money in that