Yes, it's open 24 hours.
Having worked in retail for 27 years, what usually happens is from 11pm-7am there usually is a skeleton crew. I assume there is someone there but may overlap another area as well like a cashier supervisor, or someone that watches over the self serve lanes
Its open 24/7 but they stop selling alcoholic beverages at 1 or 2 in the AM
Not really sure, but since the Walmart is open 24 hours, it's probably open all day.
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