We were there last month January 15-23 and this is on the flyer given out during evening EMH:
Table service:
EPCOT: San Angel Inn (guest may be seated up until 10:00PM)
MGM: 50s PT (seating until 9:30PM), Sci-Fi Dine-In (seating until 9:00PM)
MK: Tony's, Liberty Tree (guest may be seated up until 9:00PM)
AK: Rainforest Cafe (main entrance)
Counter:
EPCOT: Electric Umbrella and Cantina de San Angel
MGM: Backlot express (until 9:00PM), catalina eddie's, rosies's all-american cafe
AK: pizzafari, restaurantosaurus
MK: Cosmic Ray's, Pecos Bill
These were open in January, however, I'm sure the schedules were being tweaked then, so no guarantee that this schedule will remain. We went to Pizzafari for a cup of coffee and the place was empty, but open.