Paul McIlvenny, 44, trains young boxers, including his own children, at the club.
He explained it brought families together in the area.
“It’s a network in here – the mums and dads – we’re in a WhatsApp group. We share text messages if one of the kids isn’t turning up.
“We’d be so sad to lose it.”
McIlvenny grew up with Hatton and sometimes visited his home on the nearby Hattersley estate.
He said they attended the gym in their pre-teenage years.
Hatton, who died in September, remains an inspiration for many people in Hyde, said McIlvenny.
“His roots are here – he was born and bred here and he started his amateur career here..
“You ask the kids – that’s why they love coming to this gym.”
One of them, 16-year-old Oscar, said going to the gym was his main hobby.
“I spend all my time in the week here,” he told the BBC. “It keeps me out of trouble, as well as fit and happy.”
Tyler Daulby, 23, added: “If you’re struggling with your mental health or struggling at home, you’ve got this place to come to. It helps massively.”