We live in a smaller place and my wife and I just piggyback off friends and end up going roughly once a quarter as well. We do have enough space for a year's worth of toilet paper, cleaning supplies, etc but even then it's often not worth the hassle of driving (we live in an urban enough area that we don't drive often), parking, fighting through lines, etc just to get stuff once a quarter.

Yes I'm cognizant of that. Not everything I get there is a large item. The dishwasher detergent for example goes under the sink. Bulk is basically a two pack. Coffee also just throw it in the pantry. Ditto for other drinks and food items. And electronics. I've gotten a MacBook air from Costco only for the extended warranty they offer. Another perk is free installs which I guess doesn't apply for apartment folks but I will say I got a dishwasher from them and the install being included was on it's own worth the price.

I actually only got Costco originally when I lived in Hawaii and it's kinda a requirement there but kept it cause it's actually really nice.