Not Costco per se since they carry a limited selection…………BUT…..ppl..usually of an age.who block a Supermarket aisle for 12 mins while they compare ingredients/nutrition/cost of a can of “something” along with all the others drives me nuts!!!!!!!  30 secs and they get an “excuse me”…after 45-60, their cart gets pushed aside.  This also includes Soccer Mommies with or without ankle biter(s) in tow