Contemporary art galleries are usually open to the general public without charge; however, some are semi-private. They usually profit by taking a portion of art sales; from 25% to 50% is typical. There are also many non-profit or collective galleries. Some galleries in cities like Tokyo charge the artists a flat rate per day, though this is considered distasteful in some international art markets. Galleries often hang solo shows. Curators often create group shows that say something about a certain theme, trend in art, or group of associated artists. Galleries sometimes choose to represent artists exclusively, giving them the opportunity to show regularly.
A gallery's definition can also include the artist cooperative or artist-run space, which often (in North America and Western Europe) operates as a space with a more democratic mission and selection process. Such galleries typically have a board of directors and a volunteer or paid support staff that select and curate shows by committee, or some kind of similar process to choose art that typically lacks commercial ends.
