The Costco thing sounds like a nice, low-to-no pressure sort of outing, where you would be free to talk and move around, but not have to put on any fake personality or actions. You could also go walk around a mall, park, or other place,,,, but I think having the food samples gives you something to do, plus, you have a conversation starter because you can discuss the food samples.
Not a bad idea, really, IMO.