RP - your reference to "organised for profit" seems to me irreconcileable with Sch 1 Para 1 (4) of the Act.

"For consideration", there, clearly includes a fixed payment (a "charge") to a bandleader see Para 1 (4) (a) (i) and para 1(6) (been here on para 1(6) before).

The bandleader (like the other members of a band) plays with a view to profit if there is a prospect of the chearge exceeding the expense to which the band is put.