UPDATE: Location has changed. I have changed it to the Food Court at Harbor Place - Light Street Pavilion.
They have a large Food Court in the center.
There is a walkway over the road to this location on the top floor of the convention center (Light Street - look at Google maps and you can see it). Or see BCC Level 200 on the Otakon Map.
For Friday, I am setting up a meeting at the Lobby of the Hilton which is next to some cheap meal places. The time is approximiate, and I'm trying to make an hour or so of time that other people can come to a specific location to gather.
I always seem to find myself in this building for Friday and Saturday evening panels. This is the Hotel that has a Jimmy Johns built into it right before the Hilton's main building. The Lobby is located at Eutaw Street. When you see Eutaw, cross it and follow the 2nd Skywalk, then turn left and go into the Hilton. You might want to get your food on the way (since it is on the way to the Hilton) so you can then eat and relax.
Also, if someone can refresh my memory; before the 2nd Skywalk and crossing Eutaw, you can also go in the other building (also part of the Hilton) but I seem to recall them only having a helpdesk and nothing else there to sit on. People always come and go through both these places, but I always see this place not very crowded. The closest restaurants are the Jimmy Johns & Subway if you exit the convention center (unless you want to order from the Hilton Restaurant).
Might want to order your food first and bring it to this location to then eat and relax if you are not already waiting in line for something else or rushing to another event.