Another thing to consider next March so you can market in May, is how to capitalize on peoples’ summer activities. One trainer I know does Saturday morning outdoor bootcamps during the summer only, and has been increasingly sucessful over the last three years as word of mouth spreads and as he uses his Spring classes for advertising.
Another trainer friend recruited a group for extreme race training (Spartan Race, mud races, warrior dash, etc.) It’s basically a bootcamp, but with themed trainings that relate to the different obstacles that are in the race they’re training for. They just had their first even last weekend and are training for one that is later in the summer. So he is using his training skills to support their summer outdoor activities.