Invitation abbr. concerning drinks

• Like many restaurants without a liquor lic
• [Guests must provide their drinks]
• "We're not serving liquor," on invites
• Letters on an invitation
• "No alcohol provided" letters
• Invitation stipulation
• Quartet often near RSVP
• Abbr. often preceding 29-Down
• Abbr. often near "R.S.V.P."

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.