The Unisex Foam Party fills the steam room at Achilleus with foam from 18:00 to 23:00 on the Thursday Unisex Day, when the men's spa opens to all genders. It comes round once a month.
The house is open from the afternoon, and the steam room closes for an hour before the foam starts. The rules of the Unisex Day apply, and entry needs a confirmed registration made in advance.
