Lufthansa operate a 737 between Frankfurt and Newark with 48 seats - all of them business
Just to show my anorak credentials ... This Lufthansa service is between Düsseldorf and Newark and is operated by PrivatAir with, now, an A319 with long range tanks in the cargo hold, that are formed to the shape of regular containers. I understand that this means that the a/c has fewer adaptations than the 737, so making it cheaper to convert and easier to sell on later.
OK, back to squawling babies!
--------------------
"I tell you, we are here on Earth to fart around, and don't let anybody tell you any different." Kurt Vonnegut, Jr.