Any and all of them, it is my understanding there is usually one company that runs all of the vendors in an airport. Since they are the client then literally any and all vendors in the airport can be shopped. I just did one last week and we have a pretty small airport and I was still able to pick up 5 shops pre-security and most of them are fairly simple but the pay is low too thats why its only profitable to do a bunch of them.
Triple Platinum Certified - Shopping South Central Kansas