Some of the classes are aimed at children but all were welcome, he said.
“With kids, we want them to enjoy it so they come back. We just want them to have fun and then, when they become adults, they can take it a bit more seriously.”
He added the kids learned problem-solving skills and resilience, including 14-year-old Ellie who told Radio Lancashire: “I started this to try, like, defend myself from bullies.
“I’ve noticed it helps a lot because I don’t get bullied at all and I can also defend my friends – who don’t know what to exactly do – from bullies.”
Her dad, Phil, who is one of the instructors, said he got involved to help protect his own children.
The father of four added: “I went and spoke to Nick and said, ‘look, can I put a kid’s class on even if it’s just for my four so I can teach them?’
“And it just grew from there, basically.”