All
Master Records are either an
Organization or a Household. A Household could be a single person living by themselves, a couple living together, or a family - any group of people to whom you would only send one mailing.
if you have 2 roommates living at the same address to whom you want to send 2 different mailings, make sure to keep them as separate Households in the database. Yes, they will have the same address, but if you don't make a separate record for each, they won't both get a mailing. A Household wouldn't likely be roommates, a Household would be people who are likely to donate together, to buy tickets together, or to otherwise interact with you as a single entity.
And don't worry - the
Volunteer module of donor mine is built to accomodate multiple volunteers who are part of the same family at the same Househo