We name the following, and anything else you can think of:

alter egos, albums, animals, babies, bands, bikes, birds, boats, books, book clubs, businesses, cats, cars, chairs, clubs, d & d characters, dances, dives, diving clubs, dogs, drinks, estates, events, non-english speakers, fictional characters, foods, fortresses, games, gatherings, glee clubs, gold clubs, handshakes, haircuts, hiding places, magic tricks, mascots, motorcycles, movies, nicknames, organzations, paintings, parties, pets, pickup lines, plants, products, riding clubs, rocks, rpg characters, skateboard tricks, secret clubs, ski clubs, slam dunks, songs, stories, swords, teams, trademarks, trucks, vacation homes, mascots, etc.