I've been thinking about theatre seating a lot lately. Curved is better, but straight is simpler. If it is a small space then straight is fine, but at what number of seats should we start curving? And, how many rows of seats can be on the flat part in front of the stage if the stage isn't raised? These questions have a mathematical solution, but viewer comfort and expectations still lend the analysis a subjective slant. At least, that's what I think.