The phrase "a small choir" is correct and usable in written English.
It can be used to describe a choir that consists of a limited number of singers, often in contexts related to music, performances, or community events.
Example: "The church held a special service featuring a small choir that sang beautifully."
Alternatives: "a little choir" or "a compact choir".
There was a small choir, and several ministers and politicians, who spoke, at first, in euphemisms.
The medieval rondeau was usually performed by a soloist who sang the verses, with a small choir for the refrain.
In the music, scored for four soloists, a small choir and a chamber ensemble of Western instruments, human passions and the sounds of nature become one.
And Meg Baird, of the Philadelphia band Espers, smartly boils down "When the Bridegroom Comes" to a small choir of voice and trombones.
Brian Wilson dedicated his ballad "God Only Knows" to White's family, and Don Henley brought out the gospel core of David Gray's "Shine," complete with a small choir.
What you hear is what sounds like a small choir humming the Richard Rodgers number that gives the piece its title.
Textural clarity, conferred by period instruments and a smaller choir than usual, remind us of the depth and range of Beethoven's orchestral writing.
And oddly, given the current idea that late-19th-century choral performances were extravaganzas, the society, back then, used a smaller choir: it had 100 singers; now it has 200.
"As a president of a country that's as eclectic as ours … I just think that he's speaking to a very small choir," he said.
Alexander Blachly, in a concert on Sunday afternoon with his small choir, Pomerium, usefully suggested two.
Amid tables draped in lucky red tablecloths was a boisterous wedding party, complete with video cameras, photographers, a host with a microphone and a small evangelical choir.
