Attending trade shows is rough work. Legs give out. So do shoulders and elbows as the bags you are carrying become heavier and heavier when more catalogs and brochures get added in.
Our son has been on a mission to convert my husband and myself to the "barefoot" lifestyle. He says the shoes allow you do walk in such a way that is closer to human biomechanics.
Here are my usual running shoes. They are Asics. When they grow old I use them to walk around in. I've had several pairs.