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In the context of balls, the term "first dance" has two meanings.
At various formal balls the first dance was led by the guest of honor, which was usually the person of the highest social position in a given context, such as a member of the royal family, if any were present. Their dance was the opening of the ball. As these were generally long country dances, the guests of honor would be the first people to go down the set, not the only two people dancing for the entirety of the first piece of music.
The "first dance" of a married couple is a popular element at modern European and American wedding receptions or post-wedding celebrations. The newly married couple, as the guests of honor at a dance, open the dancing. The style of dance is a personal choice. Some couples opt for a rehearsed, choreographed dance, whereas sources like etiquette columnist Judith Martin feel that performing a choreographed duet for spectators is inappropriate.
In the past, the couple did not dance the first dance alone. In her 1922 guide, Ettiquette, Emily Post recommended that newlyweds not join the dancing until after their guests had begun, and simply dance with one another first before moving on to other partners. This occurred while other guests continued dancing, and was not given particular attention or treated as a performance.
In the current times, ballroom dance is not a skill that is common within society. Therefore, some modern couples either slow dance or learn a dance, whether it be a ballroom dance style or a choreographed dance routine. The music to which they dance is also highly varied, with modern chart hits often being selected. Teaching and rehearsing the "first dance" is now a service offered by dance studios, independent dance instructors and specialist wedding dance tuition companies.
- At "Studniówka", a kind of prom in Poland, the first dance is usually a polonaise,  which students usually have to practice before the ball.
Since these times the phrase "to open the ball" has become a figure of speech for initiating an activity which will be subsequently continued by others. The term has been used in descriptions of battle scenes.
- Thomas E. Hill, "Essential Handbook of Victorian Etiquette" (1994) ISBN 0-912517-12-3 (paperback)
- Kenneth. "Balls". www.rusartnet.com. Retrieved 2016-09-10.
- Martin, Judith; Martin, Jacobina (2010). Miss Manners' Guide to a Surprisingly Dignified Wedding. New York: W. W. Norton & Company. pp. 272–3. ISBN 0-393-06914-1. Originally printed in "Tentative Steps at the Wedding Reception". The Washington Post. Miss Manners. July 23, 2008.
- Post, Emily (1922). "The Day of the Wedding". Etiquette. New York: Funk & Wagnalls Company.
- "Wedding Band Setlist". Pulse Wedding Band Glasgow & Ayrshire. Retrieved 10 September 2016.
- "Wedding first dance lessons: everything you need to know". HOLA. Retrieved 2017-01-25.
- "Your Bridal Dance Lessons Sydney". www.yourbridaldance.com.au. Retrieved 2017-01-25.
- "wedding dance lessons | first dance lessons | wedding dancing lessons". www.weddingdaydanceuk.co.uk. Retrieved 2017-01-25.
- "First Dance Melbourne | Melbourne Wedding Dance Lessons". www.first-dance-melbourne.com.au. Retrieved 2017-01-25.
- "Studniówka". www.ohsopolish.com. Retrieved 2016-09-10.
- From Rudyard Kipling's "The Drums Of The Fore And Aft": Over that pock-marked ground the Regiment had to pass, and it opened the ball with a general and profound courtesy to the piping pickets; ducking in perfect time, as though it had been brazed on a rod.