Toe covers

[TsPoet]

Do you wear sandals? I know it sounds odd, but sandals are a great way to go when it's cold. Wear wool socks under them. Or wool socks with a sandwich bag. Or neoprene socks with wool socks or... whatever it takes to get warm using combos of socks.
My feet get so cold I wear booties that are 2 sizes too big and put rechargeable heating packets inside them. Barring that, though, I do the sandals and sock of the weather combo.

[aicabsolut]

I think they'd fit fine, though you'll want to pick a larger size. Some fit over MTB shoes, so they ought to fit over your casual shoes. Look for ones that are rubbery on the bottom for wear issues, and so they won't be as slippery. I like the PI Am/Fib ones, because they're fuzzy on the inside, water repellent, and also block wind on the toes. Even when it's near freezing, I only need these toe covers and one pair of socks and not the full booties. By the time my feet go numb, the rest of me has gotten sweaty enough to go numb too, and so then it's time to stop anyway.

[crazybikinchic]

If only I could get a portable heater for my booty. It gets ice cold and stays like that forever.