There are 2 groups known as Fourplay, 1) An American smooth jazz group, 2) An Australian string quartet: 1. Fourplay is a jazz group, founded around 1990, in the USA. Current members are: Bob James (keyboards & programming), Nathan East (bass & vocal), Chuck Loeb (guitar) & Harvey Mason (drums & percussion). Loeb replaced Larry Carlton who himself had replaced the founding guitarist, Lee Ritenour in '98. Fourplay is a contemporary jazz group in the United States.