I used tennis shoes and that worked fine until I started extending my rides out beyond 30 miles. At that point, I started to get hot spots because sneakers have a very flexible sole. I purchased Lake Mtb Shoes and used them without cleats. Easy to walk in, no problem.

When I finally switched to clipless, I got Frogs and used the same shoes. Since I don't ride to work everyday, I leave whatever shoes I'll want to use in my office the day before.

Sheldon
OCR2