The Mecca

ORIGINS OF OSI

In 2008, TJ Slomka gave up a successful job in the delivery service industry to chase his goal of opening an all-encompassing fitness facility. It was here that OSI Gym was born; one room at a time he took over 5139 W 140th taking it from a mere 5,000 sq ft in 2008 to a massive 60,000 sq ft in 2024. He opened it up to local graffiti artists to create a unique and engaging environment not found anywhere else.

TJ is not an absent owner – you can easily find him around the gym checking in or training clients. As an athlete born and raised west of Cleveland, his mission is to give back to the community that created him by sharing his expertise and facility.

He guarantees all of the trainers, staff and equipment are of the highest caliber; he constantly upgrades the gym with quality and client’s feedback in mind.

Whether you’re just starting your fitness journey, returning to the gym, or ready to take your training to the next level, Old School Iron has everything you need. Our expert trainers will help you reach your goals, from weight loss to bodybuilding, triathlon prep, or building mental stamina. As you progress, our state-of-the-art facility offers a motivating environment filled with adrenaline, friendly competition, and no limits. Advanced athletes can push their limits even further with over 200 machines, plus recovery services like physical therapy and chiropractic care. At OSI, we achieve greatness together!

origins of OSI

In 2008, TJ Slomka gave up a successful job in the delivery service industry to chase his goal of opening an all-encompassing fitness facility. It was here that OSI Gym was born; one room at a time he took over 5139 W 140th taking it from a mere 5,000 sq ft in 2008 to a massive 60,000 sq ft in 2024. He opened it up to local graffiti artists to create a unique and engaging environment not found anywhere else.

TJ is not an absent owner – you can easily find him around the gym checking in or training clients. As an athlete born and raised west of Cleveland, his mission is to give back to the community that created him by sharing his expertise and facility.

He guarantees all of the trainers, staff and equipment are of the highest caliber; he constantly upgrades the gym with quality and client’s feedback in mind.

Whether you’re just starting your fitness journey, returning to the gym, or ready to take your training to the next level, Old School Iron has everything you need. Our expert trainers will help you reach your goals, from weight loss to bodybuilding, triathlon prep, or building mental stamina. As you progress, our state-of-the-art facility offers a motivating environment filled with adrenaline, friendly competition, and no limits. Advanced athletes can push their limits even further with over 200 machines, plus recovery services like physical therapy and chiropractic care. At OSI, we achieve greatness together!

" ...i STARTED TO COME HERE BECAUSE I STARTED TAKING THE GYM REALLY SERIOUS AND IT [BECAME A] SAFE HAVEN FOR ME... YOU HAVE REALLY AMAZING PEOPLE HERE THAT REALLY GIVE YOU THE FEELING THAT YOU ARE WELCOMED... YOU WOULD PEOPLE HERE ARE INTIMIDATING, BUT IT IS REALLY THE POLAR OPPOSITE ." -MAX HESS, REGULAR PERSON

" ...it's a very hard-core working atmosphere. You see people working, you see people pushing, you see people are serious. TJ [the owner] spares no expense on equipment... all kinds of equipment here you don't see at other gyms. He's a great gym owner to work with and provides one of the best atmospheres for training. There is no gym I would rather train at. " -big mike ely, pro bodybuilder

the mecca

the mecca

the mecca

ORIGINS OF OSI

origins of OSI

@OLDSCHOOLIRONGYM