I'll ride platform pedals in anything but, my favorites are sneakers designed for volleyball. Somehow they have a nice sturdy sole and flattish tread (so it doesn't get in the way) and nice support -- they work great on the bike.

If you go to a site like Zappos.com you can look under athletic shoes and pick your sport then browse. Maybe any court shoe would work as well.

Wool clogs w/ the cork beds are actually my second favorite b/c of the stiff, but smoothish sole!

Good luck!