Yeah, we're talking about the army that rolls out chain stores in warzones as SOP. Apparently it's pretty haphazard from he inside too, but nobody else can remotely pull that off.
I don't know about gift shops, but definitely fast food and probably clothes too.
Yep, there's a guy buying shoes in one of the Wikipedia article's pictures. Appliances and electronics too. Anything a soldier could reasonably want to buy, although apparently they have their own brand for auto sales, as opposed to a chain.
Navy SEALs eating government-supplied but non-free Big Macs as bullets whistle overhead is just the most aggressively American. I also get a kick out of soda fountains on submarines, although it makes total sense from an engineering perspective.