The club was primarily for beginners who wanted to learn different dance moves including waltz, tango, and foxtrot.
Mr Ormsby first learned sequence dances when he was at secondary school. He and his wife have been dancing for 54 years.When the group was first started an average of between 30 and 40 people attended each class. Now the club often saw between 50 and 60.
Mr Ormsby said most of those who attended the classes were retired, with the eldest being 96 years old.
He said the group had lasted so long because it was fun and entertaining.
"We put it down to people coming and enjoying themselves. If you can't quite do the step as we have shown you, you can still come in, do as many steps as you would like and have fun while doing it.
"Everybody who comes enjoys themselves. That is why the group is so successful."
Dancing helped to keep his mind and body fit, he said.
"My mind is focused and my energy is up. I am 76 now, so I am doing pretty good."
Mr Ormsby said he hoped to keep dancing with the group until he was in his 80s.
A 25-year-celebration will be held at Greerton Hall tonight, from 7pm. Entry is $5 a person with semi-formal dress. Current and past members are welcome at the event, as is anybody interested in joining the club.