An informal luncheon invitation is a short note sent about five to seven days before the affair.
500 Park Avenue,
April 30,1922.
My dear Mrs. Emerson,
Will you come to luncheon on Friday, May the fifth, at half-past one o'clock? The Misses Irving will be here and they want so much to meet you.
Cordially yours,
Katherine G. Evans.
Accepting
911 Sutton Place,
May 2, 1922.