How about nude photography session, with 2 models (male & female)? Theme could be 'Intimate'.
It could be 'landscape' if we do it at a secluded beach, 'portrait' if we do it in a studio, or 'macro' if we get real close. I can bring my dog and it can also be 'pet photography'! Only group we cannot cater to are the street photographers. I think it's illegal to walk in the street naked.
I always wanted to try nude photography but shy.