Invitation stipulation

• "No alcohol provided," briefly
• Party invite letters
• Brown-bagging letters
• "We're not supplying liquor"
• Invite abbr
• Letters on a party invitation indicating that booze won't be provided by the host
• "We won't be bartending"
• Invite letters
• Informal invitation letters

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
initialism (acronym) for "bring your own bottle" or "bring your own booze," by 1951.