Curtain Call

Entry in progress—B.P.
   
Wikipedia: Curtain call
A curtain call (often known as a walkdown or a final bow) occurs at the end of a performance when one or more performers return to the stage to be recognized by the audience for the performance. In musical theatre, the performers typically recognize the orchestra and its conductor at the end of the curtain call. Luciano Pavarotti holds the record for receiving 165 curtain calls, more than any other artist, for his February 24, 1988 performance of Nemorino in Gaetano Donizetti’s L’elisir d’amore.
 
(Oxford English Dictionary)
curtain-call  n. a call by an audience for an actor or actors to take a bow after the fall of the curtain.
1884   ‘F. Leslie’ Let. 15 July in W. T. Vincent Recoll. F.L. (1893) I. x. 176   You will find a room specially adapted for rehearsing curtain calls.
1909   ‘O. Henry’ Roads of Destiny xxi. 377   Uncle Sam has nine curtain-calls holding Miss Panama by the hand.
1909   Westm. Gaz. 17 Apr. 1/3   Thirty ‘curtain calls’ rewarding play and players.
 
Google Books
21 May 1840, The Musical World, pg. 317:
The new opera was perfectly successful. The names of the author and composer were given out with enthusiasm, especially that of Auber, and the leading performers had the honours of the curtain call.
   
Google Books
The Old Vic
By Cicely Mary Hamilton and Lilian Mary Baylis
New York, NY: George H. Doran Company
1926
Pg. 120:
On the contrary, it wished to express its hearty disapproval - and disapproval, not compliment, was the origin of the actor’s curtain call. A roar of disapproval which would hold up a play until the wretched delinquent came out to face the music—the hoots and the hisses of the disappointed, and it might be their missiles as well.  In brief, an experience the actor desired to avoid.
 
OCLC WorldCat record
The Curtain call : a one-act play.
Author: Gordon Grant
Publisher: New York : Longmans, Green and Co., 1930.
Series: Longmans’ play series
Edition/Format:   Print book : English
 
OCLC WorldCat record
Taking the curtain call; the life and letters of Henry Arthur Jones,
Author: Doris Arthur Jones
Publisher: New York, Macmillan Co., 1930.
Edition/Format:   Print book : Biography : English