Occasionally a band was allowed to do two numbers (possibly the A-side and B-side sides of their latest single or an EP or LP track); bands of a higher status such as The Beatles or The Rolling Stones would sometimes play up to as many as four numbers.
Occasionally, bands were permitted to perform a set consisting of two songs, possibly the A-side and B-side of their latest single or an EP or LP track; more established acts like The Beatles or The Rolling Stones could sometimes perform as many as four songs.