A gym with a kitchen in it would probably confuse, or even scare away some people.
Isn’t a gym supposed to just be a gym?
Well, no. First of all, the definition of ‘what a gym is supposed to be (or look like)’ varies greatly and is continually evolving.
Second, if you’re investing all of that time and effort into getting the exterior of your body into shape, shouldn’t you learn how to cook and fuel what goes inside it as well?