Not all houses in the
SCA are based around themes and activities. Sometimes all the members share in
common is the desire to camp and event together. (This is not to be laughed at, it's very helpful when you forget your
corkscrew, or run out of
propane for your stove.)
Contrary to what seems to be a common belief, secret passwords, common dress or activities, or shared styles are not needed to form a household. (It's said in the SCA that a household is any gathering of people who claim they are one.)