Exactly! One reason SW is so profitable is bc it only flies 737s. Every SW flight I've been on has front and rear lavs. They do make an announcement now about the fact that the FAA prohibits lines from forming up front near the cockpit, so they tell you to wait until you see someone exit before going up there. I'm not sure how you're supposed to know that someone is in there w.o going up to check, but I guess as long as you don't hang out there, it's ok.