Mt. Pleasant mainstay Haydee’s is asking D.C. regulators to allow it to stay open 24 hours a day, seven days a week.

Photo by maxedaperture. It’s the big question of the day: what’s actually open for those of us who have been stuck inside all day and are suffering from serious cabin fever? DCist has confirmed the not-even-close-to-comprehensive list below — of course, with the snow coming still coming down, we highly recommend that you call individual destinations on your own before you make your way anywhere this evening. Grocery stores: Hoo boy, grocers are going…