Sometimes I go to Walmart or Sam's Club for the shopping and the people watching.
Do you shop for anything specific?
I sometimes get Sam's Choice things at Sam's Club (owned by walmart) because they're a good price for what you get.
What sort of Sam's Choice things do you especially like?
I like some of the Sam's Choice dry goods. Like generic cereals and things. The quality is better than most store brands that aren't from membership-only retailers. Costco also had good store brand quality.
Is the price of the Costco store brand items comparable to the price of the Sam's Choice items?
I think Costco is a little bit more expensive. That being said the quality of their in-house beef and rotisserie chicken is well worth the premium.
Do you like to buy in bulk at Costco? 
For sure. I buy wine in bulk at costco. I quite like their Kirkland store-brand Pinot Grigio. I also get things like bottled water and toilet paper there in bulk.