I wear alot of tennis shoes for running and working out, and light trail hikers the rest of the time. Tennis shoes run fairly quickly if you run 25-30 miles a week. I also retire my trail hikers a little early (before structural collapse, 200-400 miles) and after a while have stashed pairs in the car, under my bed and in at least one other BOB type thing.

I've also stashed a pair of my tennis shoes in the back of my car and that has worked out well, when a client came out of his burning house without shoes (or socks, warm pants etc). My size 10s fit him really well and I didn't mind leaving them behind (the local Red Cross ultimately gives fire victims $ for replacement shoes, clothes, warm coats etc - the hand me downs are temporary, but why should a person have to stand around on wet cold pavement or be limited to sitting in the back of his vehicle).

Old tennis shoes also go into the backyard shed for mowing lawns - if I come out of a burning or collapsed home, I can get a pair from the shed, shake out any spiders, and have relatively warm and dry feet. Nails, broken glass etc are the problem post disaster - I'd rather have a pair of trail hikers, which is what I wear going in after a fire and doing damage assessments.