Fitness enthusiasts and the simply curious turned out to try the brand new weights and cardio equipment free of charge, as well as meet the team at Alpine Health and Fitness.
One of the new members was a 73-old-year old Queenstown man who chose the facility because it was near home and it had the equipment he needed.
Open day visitor Mary Todd said she had become a member weeks earlier.
"It's awesome; fantastic. I like it because it's in Frankton and I'm a Frankton resident and it combines with my swim classes."
Visitors Jackie and Bruce Welch, of Ashburton, said they were interested in Alpine Health and Fitness because their own community had been talking about centralising its sports facilities for 30 years.
"It's amazing. Every city or town should have a facility like this," Mrs Welch said.
Mr Welch said the Queenstown Events Centre's "multipurpose" nature was impressive.
Health and fitness manager Richie Heap said the open day was a success and visitors complimented staff on the gym's value for money, as swimming in Alpine Aqualand was included.
Other feedback favoured the gym's lofty views out to the cricket oval or pools, its air-conditioning, ease of car parking and central Frankton location.