They say a sign greeted members at the Impact Athletics and Fitness Club in Cary saying the business was closed, effective immediately, for financial reasons.
The gym was open for business earlier in the day, but some time during the evening the signs were posted.
Some members say they had heard rumors that the business was struggling, but to others it came as a surprise.
"It's unfortunate, it's been a great gym," gym member Andrew Bryant said.
Bryant says the place was always busy. He says his wife had went to the gym earlier Friday and it was open.
"My wife was in this morning working out, and she had heard through the rumor mill that it was a possibility of shutting down, but again that was rumored, and so I can't believe it shut down just within one day," Bryant said.
He says the signs posted on the door wasn't the way he would've liked to learn the news.
"A letter in the mail would be great, but everyone has their own means for shutting down, but this is their method," Bryant said.
However, the news didn't surprise member Kevin Dyck, he says his personal trainer had tipped him off that the business was struggling.
"Cash was going out and not enough was coming in, and the rumors were that they were going to shut down, and a number of employees quit," Dyck said.
Police were called to the gym Thursday in regards to employees who were having issues getting paid.
If a closing had been in the works there weren't too many obvious signs. The gym's Web site, www.impactathleticsnc.com, is still seeking new business, even soliciting resumes for a couple of open jobs.
It's unclear exactly who the current owner is; members say one name, but the Better Business Bureau lists another.
And the sign on the door directs members to call an out-of-state number that belongs to a lawyer in Long Island, New York. That number is 516.396.0385. When ABC11 called Friday night, no one answered.
It's estimated the gym had several hundred members, many of whom have already been charged their November dues.
Members say they'll be calling their banks to make sure the gym doesn't draft any more money from their accounts.