Hear me out: Feud but with single players instead of teams. At most, three players per team but people in the background can help. Instead of the faceoff, do a coin flip for control. Or have both callers on the line, and whoever says their name first gets to guess. Higher answer gets to play or pass. Maybe limit the board to five answers.
I'm also tossing around how to do Millionaire, but with Ask the Office (basically no more than five other people at the station), Ask the Expert (the resident trivia buff at the station or even better one of the cohosts or staff members), and 50/50. Ask the Office might be a little time-consuming, but maybe give them :10 to write their answers on a dry-erase board.