hygienic dark retreat

Location secured for world’s second hygienic darkness retreat: newly remodeled small cabin in quiet neighborhood of Swedish resort town. Modifications commence tomorrow; first retreat within two weeks.

EDIT: the above attempt failed. Taking a bare cabin with only electricity and heat and trying to make even a simple bathroom, kitchenette, and ventilation proved overwhelming. No, the thing is to start with a fully functional building, darken it and start retreating, already. This will require taking the message to the people again.