Thanks for the insights - though I am confused that so many got their panties in a wad because I asked about their store hours. Oh well, this is the Disboards - that is to be expected around here!
We have Sams and Costco, 2 blocks apart. If Costco is closed, we go to Sams. Costco is my first choice but not everyone can shop between 8-5 (8 on weekday) so they don't always get my business. Ours Sams is just as clean, just as friendly, and have great customer service as well. I prefer Costco brand products more than Sams Choice but if they aren't open, I go up the street. No biggie to me.
(and I do grocery shopping after 10pm when I go, I don't have hours in the day to get it done. Thankfully my Kroger is open and empty at that time! It's a great time to go)