Water Use Calculator and missing fixtures?

We have recently received the design review comments for our project which is predominantly residential and includes a Dog Spa and Bike Maintenance areas available to residents only. The technical advise suggests we revise both designated areas to include all fixtures such as water closet, lavatory faucet, shower, and kitchen sink usage. Neither designated areas have some of these additional fixtures and the occupants are specified as transients (not open for public use but for residential use only). Is it necessary to include the fixtures if the anticipated users of the space will be the residents themselves? We want to count the water that will be used in the space, however, any advise on how to move forward is helpful. Thanks!