HEAVY METAL uses special expressions to determine and describe gyms.

'MM' stands for '2000' (MM is the Roman numeral for 2000). MM represent the 'Arnold' world.
'MMX' signals an upgrade how gyms work from the year 2010.
'MMX^PLUS' is the next upgrade starting from ~2015 / '25 and it stretches into the Forties.
The upcoming major upgrade - MML - takes place in around 2050.
The for now last upgrade - MMC - leads us into the 22^nd century, starting in the mid-Nineties.

We never forget the Arnold Schwarzenegger roots but add new stuff over time.

'FERRUM' is the Latin word for 'Iron'. This implies the prime necessities in equipment and service.
'ARGENTUM' is the Latin word for 'Silver'. This stands for a wider variety of equipment along with a higher service.
'AURUM' is the Latin word for 'Gold' and gives you the maximum option in equipment and service.
AURUM comes in two flavors: The lighter version offers service such as coaches and Sauna from 6am until midnight, while the full version offers unlimited service 24/7.
FERRUM, ARGENTUM, and AURUM are Next Generation (MMX^PLUS) Gyms always give you 24/7 access without excemption.

'BASIC' service (classic gyms) is very similar to the FERRUM service level: Only necessary service, no amenities.
'REGULAR', 'V.I.P.', 'ROYAL', and 'DIAMOND' provide gradually better service from stage to stage.

'IRON' provides the basic equipment to perform Squats, Bench Press, and Deadlifts.
A Power Rack makes the workout safe.
Dumbbells from 2(½) to 60 kgs help to build strength as well.

'BRONCE', 'SILVER', 'GOLD', and 'PLATINUM' gradually enhance the variety of equipment such as plate-loaded machines; weight-stacked machines; electronically enhanced (also AI) machines, Nautilus machines, Power circles, Endurance circles and more.