As noted earlier, there were fans that left before and during the final segment on this week's episode of Monday Night Raw. The pic below (sent by Don G.) shows empty seats in one section. The upper level was tarped off.
In theory, things should start to pick up later this month when John Cena and Brock Lesnar return but the ratings and recent attendance at some of their recent shows is not a good sign.
Hopefully things can pick up as we get closer to the Royal Rumble.