I'm proposing us to have "primary concert venue"-relationship which would be used between artists and places.

Artists often perform on the same venue frequently enough to call the place primary concert venue. This is often based on some sort of business-relationship. Especially symphony orchestras are usually having home for the orchestra (orchestra and hall owned by the same organisation).

Wiki-page: http://wiki.musicbrainz.org/User:ListMyCDs.com/Primary_Concert_Venue_Relationship_Type

Some examples of relationships between Concert Halls and Orchestras: http://en.wikipedia.org/wiki/List_of_concert_halls
More examples on Google-search with "primary concert venue": http://www.google.com/search?q=%22primary+concert+venue%22 and "home of the orchestra": https://www.google.com/search?q="home+of+the+orchestra"