Depends on the gym, alot of gyms don't like 'keep fitters'. A good gym will train you and make you feel welcome wether your a keep fitter or not.

A keep fitter is not some one who dosn't want to be a pro boxer, its some one who dosn't want to compete at all. a 23 year old who wants to fight amatuer is nothing any gym would turn down, especially at your weight and build.