For most of its existence, the Penguin Cafe Orchestra didn’t much resemble an orchestra. They sounded more like the house band at a bacchanal in an imagined, druidic British past, and no matter how much jazz and classical and African music they folded into their sound, listening to songs like “Air à Danser” and “Pythagoras’s Trousers” still felt like attending a party where everyone knew how to play an instrument. On 1993’s the final album before leader Simon Jeffes’ death in 1997, the band explored a stately, string-oriented sound better suited to a parlor than a party. Penguin Cafe, the successor led by Jeffes’ son Arthur, has largely continued in this vein while hinting at the folky exuberance of the earlier work. It’s funny that they should drop “orchestra” from their name given how much more they sound like one.