Associations project, from TOP: You want to build a site similar to a private Eventbrite which allows users to create events and then manage user signups. Users can create events and send invitations and parties (sound familiar?). Events take place at a specific date and at a location (which you can just store as a string, like "Andy's House"). A user can create events. A user can attend many events. An event can be attended by many users. This will require you to model many-to-many relationships and also to be very conscious about your foreign keys and class names (hint: you won't be able to just rely on Rails' defaults like you have before).