Possible Clues:

• Bess's partner loses head in drunken revel
• Disabled operatic hero losing head in wild party
• A little revelry groups may get up to?
• Party hosted by floor gymnasts
• Regularly do drugs before end of very wild party
• Satyric celebration
• Frenzy; bacchanalia
• Indulgence consumed by major gymnast
• Function with no limits?
• Unrestrained group revelry