For my commuter, I got some double sided Ritchey MTB pedals. (You can find these cheap online all the time.) Just stomp and go.

For my go-fast bike, I've got Ultegra pedals. They take a little getting used to with the flip-and-clip motion. But interestingly enough, they have such a big surface that you can ride them as platforms with running or soccer shoes very comfortably:



I wouldn't ride a century like that, but no worries for a quick errand.