Mrs Thomson said quite a few younger professional people had joined the group, which is made up of teachers, doctors, nurses, retirees, students and farmers, "all with the same interest".
The choir rehearses on Wednesday evenings, at Rosewood Funeral Home, and puts on two performances each year.
The first concert, usually in May, is "something classical" and the second is "light hearted", usually in October or November.
Wairarapa Singers celebrated its 20th year anniversary in May with a sell-out concert at Rathkeale College's auditorium, performing Mozart's Requiem with an orchestra of 28 and four soloists.
"We're a community choir but that doesn't mean to say that we aren't professional," said Mrs Searle.
"Because we're from a smaller country town - 'Hicksville' - people get surprised at how good we are."
In 1995, a group of interested singers met up and formed Wairarapa Singers under conductor Ian Hodge.
Mrs Searle was encouraged to join the choir by Mr Hodge, with whom she worked at Greytown Hospital, where they would often sing to the patients.
"I always liked singing, it's a happy gene," she said. "And people who can't necessarily express themselves through words can through singing."
Mr Hodge resigned in 2011 due to ill health and since 2013 Angela Cook has been musical director of the group.
"She's a wonderful person who has lots of energy. She is positive, creates a great atmosphere and jells well with the choir," said Mrs Searle.
Mrs Thomson, who has been involved in many different singing groups throughout her life, joined Wairarapa Singers after a friend suggested she came along, and she has "never regretted it".
"It's a big commitment if you want to give it your all."
She said it had been a great way to meet people and she enjoyed the challenge of having to learn new songs all the time.
"Singing has really proved to be good for you and your mind as you get older. It's good for the soul."
Wairarapa Singers has sung in supermarkets, churches, Aratoi, Rathkeale College, the Town Hall, and at carols in the square at Christmas.
Next month, the group will start rehearsing for its November performance, a Proms Concert, which will be performed in the Town Hall in collaboration with the Masterton District Brass Band.
Wairarapa Singers secretary Pete Smith said it would be a fun show, with a mixture of serious and light musical classics.
Mr Smith said the group was always looking for new members and anybody who enjoyed singing was welcome.
"It takes a lot of hard work but it's like any job, doing it well is always satisfying.
"Learning new music isn't always easy. You might be singing in French, Italian or Latin."
Mr Smith said it was all about "getting there in the end and getting it right, doing it together and putting on a good show".
