There is a middle ground between "315 Main St Room #4" and "her place."  It could be a town if the town is not tiny, or the county if it is.  In NY, I prefer "Financial District" or "Harlem" or "South Bronx" or "Coney Island" - these places can be neraly two hours apart by train.  It saves people time not trying to contact someone who lives outside their range.