Ann Driver, an artist and co-founder of the group, said Trapezium Arts puts on community events in between the main art exhibitions, including a recent collaboration with Bradford College students.
Ann said: “At our first exhibitions we’d have 30 or 40 people, and I’d sit all day in my little chair in the gallery freezing to death and maybe have two or three people come in.
“Now there’s a constant stream of people, on our opening days there are often between 200-400.”
She added: “I’m just going to miss it so much, I really am.”
May Day! runs from 2 to 30 May on Saturdays, Tuesdays and Fridays between 11:00-15:00 BST and is free.