I just got off the phone with Disney Dining for the Disneyland resort and made a reservation for Cafe Orleans at 2am. Reservations were available through 3am. Blue Bayou was also available until 3 am although when she looked in the system the latest reservation available was 11:30pm.
Then the incredible CM who made the reservations for me looked up and gave me the following information on what is scheduled to be open that day/night.
The French Market to be open until 3:30am
River Belle Terrace to 5am
The Bengal BBQ to 3am
Jolly Holiday Bakery to 6am
Little Red Corn Dog cart to 3am
Village Haus to 5:30am
Tomorrowland Terrance to 6am
Plaza Inn to 2am
Golden Horseshoe to 5am
Troubadour Tavern to 7:30pm
There might be more, but I was feeling a little guilty taking up so much of her time and so that is all I have so far. Now if they only had a line to call to see what rides where scheduled..