I was kinda figuring that it’s after the episode where they get over whatever gripes they have with Costco. Dale most certainly not have a membership card but Hank takes him anyways. Also I don’t think Hank would think it’s communism since Costco is actually a pretty damned good example of Capitalism done right with it undermining competition via lower prices using clever tricks rather than market dominance, he would probably have a different gripes like how far away it is versus how much they save or thinking they’re fucking over customers in some unseen way like selling old food or something.

I imagine it’d probably be something along the lines of Peggy dragging Hank to Costco and Dale tagging along for one reason or another. I could also see it becoming a mild gag in later episodes where Dale and Hank come back from Costco with mostly normal things but Dale buying the occasional weird shit in bulk.