Hilary Thomas, 65, a member of the choir, said she "absolutely loves" it.
"I don't really care, I can hear my own voice but I don't care," Ms Thomas added.
"It's the fact that it's a tuneless choir and I thought, well, I'm tuneless, so I can come to this choir."
Ms Williams said she wants the choir to be a "safe space"
"We've got people here who maybe be struggling with mental health issues. Some people come because they want to get better," explained founder Ms Williams.
Andrew joined the choir after he retired.
He said: "Whilst I'm not tone deaf, I find it quite difficult to keep the pitch of a note and my sense of rhythm is not great either. But that's fine here."
There are still spaces left for people to join the new Wednesday evening class.
