Yes, they do, but the domestic US version of first class. Also, the 737s in the article were departing on a 6+ hour flight to Hawaii, so they're not only used f

Yes, they do, but the domestic US version of first class. Also, the 737s in the article were departing on a 6+ hour flight to Hawaii, so they're not only used for short haul flights. Lots of coast to coast flights of 5ish hours are also on single aisle planes.