multi-use residential building, usage groups?

The project is a residential building, but also has a small recreation space in cellar and a small retail space and gym on ground floor, how should the usage groups be defined? More specifically, if I am going to create a usage group for the resident apartments, then don't i also need to allocate some of that occupancy for the recreation spaces restrooms, etc.? This seems like such an amateur question, but does each fixture group value per each category (FTE, transient, etc.) need to equal the Daily Occupancy values defined in one of the PI forms?