Originally Posted by TWA Fan 1

CO does not fly any 737 configured for 127 passebgers in Y.

Its 737-800 without the midcabin lavatory (the workhorse of transcon out of EWR) is configured for 141 passengers in Y, Thus, this works out to 70.5 passengers per lav, almost 50% more pax per lav than on the ERJ.

The 737-800 without midcabin lav was fine for its original purpose, which was medium-haul routes. But when you have so many people sharing so few lavs for over 6 hours, it gets pretty brutal.