A gentleman who is a good pianist may, with perfect propriety, offer his services to the hostess as orchestra for impromptu dancing, or may offer to relieve any lady so engaged, to allow her to dance. If, however, there are more ladies than gentlemen, and he is needed to fill up a set, he must not insist upon playing, but go where he is most needed.
Never offer to turn the leaves for any one playing unless you can read music rapidly; otherwise you may confuse the performer by turning too soon or too late.
Never offer to sing a second unless invited by the lady who is to sing also. The hostess may wish her friends to hear a duet, which will be disagreeable to the performers.
Members of the same family, cousins or other relatives, should not keep together in general society. They can see each other on other occasions, and the object of parties is to promote sociality, not exclusiveness.
If you are asked to play an accompaniment, do not seek to display your own talent, but play so as to afford the best support possible for the voice singing. The same rule applies to a second in any instrumental duet, which is never intended to drown the sound of the leading instrument.
When the lady of the house invites any lady guest to sing or play, the gentleman standing nearest to her should offer his arm to escort her to the piano or harp. He should stand near her during the performance of the music, and, if competent, turn the leaves of her music. She may also request him to hold her gloves, bouquet and fan. When she rises, he should conduct her to a seat, and thank her for the pleasure she has given him and others.
It is ill-bred to comment upon the piano, even if shockingly out of tune or worn out. To look at a six-octave piano and decline playing because all your music is written for seven octaves, is positively insulting to a hostess. If it is true, decline upon some other pretext.
Private concerts and theatricals ought to be very good to be successful. Professional singers should be secured for the former, and if amateurs sing, they must be very confident of their own powers before making the attempt to appear before an audience, even of personal friends. Between the parts, conversation may flow, but is rude in the extreme during the performances. The best hours are from two to six or from eight to eleven P.M. The rooms should be arranged so as to allow a clear space at one end for the performers; the guests should be seated, and a general silence prevail excepting during the intervals of the performance. If the concert is divided into two parts, it is quite permissible to rise during the intermission, promenade if agreeable, meet friends, and change seats, being careful to be seated again when the performance re-commences.
For private theatricals, only the best amateurs should be retained. It is very rude to talk during the acts, and while applause should not be too boisterous, disapproval by hissing or otherwise is a thing unheard of. Ices and light refreshments should be handed round between the acts. Where there is no arrangement for a private theatre, and where the curtain is hung, as is most common, between the folding-doors, the audience-room must be filled with chairs or benches in rows, and, if possible, the back rows raised higher than the others. These are often removed at the close of the performance, and the guests then converse or dance.
To beat time or hum the air at a concert is in extremely bad taste.