How about this?
A band strongly implies that the members play instruments, aside from just singing and dancing. The Beatles and U2 are examples of bands. A group can be any band. The Beatles and U2 are also groups. But a group can also refer to performers who don’t play instruments onstage (or in a music video). These performers primarily sing and/or dance.
A band strongly implies that the members play instruments, aside from just singing and dancing. The Beatles and U2 are examples of bands. A group can be any band. The Beatles and U2 are also groups. But a group can also refer to performers who don’t play instruments onstage (or in a music video). These performers primarily sing and/or dance.