Possible Clues:

• Group where it doesn't pay to be a step ahead
• Enrich soul performing a stage routine
• Group of dancers refrain, joining queue
• Group of dancers lurches on – I must get changed
• Dancers on stage refrain, in part
• Group getting its kicks?
• Group of dancers refrain, in front of band
• Row of dancers in a musical
• Musical group stepping out together
• First-class row about Egyptian deity taking part in cabaret