Any where that I think has minimal fecal matter! I hate having to wear shoes on a regular basis so I am quite happy to go out in the yard or to the beach bare foot. I will not walk bare foot through a parking lot. That's where I draw the line!
I guess it depends on the place. I tend more toward sidewalks and those aren't always as bad.textures are so much more fun after your soles are a little tougher and it's just like different levels. I like a dirt road too if you can find such a thing anymore.