So this is where my bias comes in and I will be honest about this. I own a training gym so this is my favorite (which is why I opened one) and I will try to be as unbiased as I can with the description. Training gyms offer large group, small group or semi-private, one-on-one training or any combination of the three, in a smaller space than that of a membership gym. Anywhere from 1000 sqft to over 10,000 sqft. These gyms often do not have access membership nor do they have much in terms of cardio equipment. Training gyms focus on the training, so like most other training based gyms like CrossFit or boot camps, you will not have a membership unless you are getting coached. This is a blanket description and there are many variations within this category. Training gyms typically will offer some form of a trial so you can try out the gym before you commit to a longer term program. This is designed so that you can make the best decision possible when it comes to long term training; training gyms want you to be there. There is less of a hard sell mentality in training gyms