The phrase "a former choir" is correct and usable in written English.
It can be used to refer to a choir that previously existed but is no longer active or has been disbanded.
Example: "She was a member of a former choir that performed regularly in the community."
Alternatives: "an earlier choir" or "a past choir".
Mr. Burdick lived with a former choir member while separated from his wife.
In 2001, a former student sued the school and a former choir director for sexual abuse he said he suffered in the 1970s.
The 18-stone Fagerson is something of an all-rounder, being a qualified lifeguard, a downhill mountain bike champion and a former choir boy.
Fight Like Apes formed late 2006 when Mary-Kate Geraghty (known as "MayKay"), a former choir singer, and her friends, Jamie Fox (known as "Pockets"), Adrian Mullan and Tom Ryan, all of whom had experience in other bands, came together.
She learned the theory and techniques of the craft from one Carl Stough, a former choir master and musician who taught his singers to breathe deeply and then adapted the technique for others in salvaging the voices of emphysema patients at a Veterans Affairs hospital in New Haven, Conn.
Their lead singer, Feargal Sharkey, was a former choir-boy who mocked "mummy's boys" but really wanted to be one and, in his best-known song, hated his mother's approval of her goody-goody nephew.
Living inside what she called "a church bubble," the former choir girl's musical exposure was limited to listening to black gospel while developing an appreciation for the banjo through her mother's side of the family, including her grandpa ("an amazing bluegrass player"). .
The choir opened the hot line after a local newspaper reported last week that two former choir members claimed that they had been sexually abused while in the choir decades ago.
GREENWICH, Conn., Feb. 16 — A well-known lawyer was indicted on Friday on charges that he obstructed justice and destroyed evidence in the investigation of a former church choir director whose laptop computer contained images of naked boys.
But that former choir girl, all grown up and singing for a living, will get to return to Valparaiso to spend time with Aunt Pam, who sold the bowling alley a while back.
The former choir loft, over the living room, is now an office.
