One thing I always say everytime we go to the US, Walmart aka Asda has bugger all selection wise when it comes to food, it's more like the local Co-Op.
... and HUGE bags of what THEY call "chips" ... and WE'VE always known as crisps ... AND sweet sod all choice of soft drinks [that WE DO HAVE] to wash them down with! Yet MOST of these massive Walmart stores remain open round the clock.