Go all the way and buy elements written by a prom/party supply company. Should get patio furniture from ‘stone’ pillars, “gas” streetlights, to giant horseshoes (how Batman!). There’s a link any good supply company, next. Not cheap, but very re-usable! With the appearance of the Pirates of the Caribbean movies, teens love the concept of having a pirate fancy dress party. Create a treasure map to serve as the invitation, which will set a bad tone of the party. Create…