Law /
Opening a gym in Gdańsk [30]
I would say its important to balance out between cardio/weights/core stability areas. I have been to gyms where there is too much of one and not enough of the others. Usually i find that a gym has way way way too many cardiovascular machines such as tredmills, steppers, cross trainers, rowing machines etc etc that take up three quarters of the gym.
It also depends on what people you are looking to attract into your gym, not everybody is into the 'free weights' some people prefer the 'assisted weights' (people who are usually starting out or are not comfortable using free weights)
It is also important to have a 'cool' gym invironment, make people work and sweat instead of them doing it as soon as they walk through the door. Make sure you have a good air conditioning system or at least a number of fans set around the gym. If people want to train for hot weather conditions they will find somewhere to do it :)
You may also want to look at setting up a number of classes, for example at my local gym there are 'body pump' sessions, 'abs attack' sessions and other such classes that are specific to muscle groups/cardio etc etc.
(cardio cinema)
With this you don't need to go over the top on really expensive tv's or systems, again at my local gym they have decent sized tv's that have different channels on them and each of the cardio machines has a box you can plug your ipod/phone headphones into to listen to the tv.
