In Johannesburg most advocates belong to a voluntary association, the name of which is the Johannesburg Society of the Advocates. This is the largest Bar in South Africa and it has approximately 600 members, practising in chambers held either in the city centre, or in Sandton. In the city centre, members practice in Innes Chambers and Schreiner Chambers. In Sandton, they practice in Sandown Village, Maisels Chambers, and The Chambers. Members may only practice in venues approved by the Bar Council.