Mungo Jerry are one of rock's great one-hit successes. Outside of England, they're known for exactly one song, but that song, "In the Summertime," is a seasonal anthem known by listeners who weren't even born when it was released. Mungo Jerry was a solid blues outfit as well – in fact, one suspects they were the kind of blues band that purists Alexis Korner and Cyril Davies would have loved, had they ever intersected – and knew how to get the most out of their jug band sound, which helped them survive for decades.