Sauna

I am working on a hotel project, which would use standard fixtures (no high-efficiency fixtures), but would still earn 2 points under WEc2, and 2 points under WEc3 due to utilizing recycled gray water for flush fixtures. Clients are reluctant to use high efficiency fixtures due to a hotel's design standard. Clients included sauna facility in the building design. Sauna would consume more water through flow fixtures. I am concerned that because sauna, default fixture uses # would be advised by a reviewer to reflect increased use of flow fixtures. That would prevent the building from the meeting WEp1 requirements. Would it be ok with using default values, or should i modify the default values early in the process, asking my clients to change fixtures, so I could avoid the building from being ineligible for LEED certification?