As I do design for "conference" rooms, I tend to play it on the safe side. A bug eye, fluorescent battery pack, etc. on the plans is in the grand scheme of things cheap, ~<$100. BUT, get some inspector, FD, etc. with a wild hair who wants it AFTER the fact and you're looking at $2-300 and a ticked off client.
Typically, if the conference room has two doors, not necessarily for body count but to be able to divide the room up into two small conference rooms, I will put emergency lights. Only one door, no.
Now, rest rooms are quite another matter. Some AHJ?s want emergency lights is EVERY rest room, some only if there are two doors, even if both doors lead directly to an exit way. Again, I generally play it safe. Often I will take a two head fixture and put one head in each RR.
Whatever, they can always find something to kick you in the read. With that said, lately I have had good relations with the AHJ?s. I try to contact them during the design process and they appreciate that.
RC