Crown Terrace Methodist Church and St. Mark's Church of Scotland are the current members of OAK - Organisation of Aberdeen Kirks- an ecumenical initiative. The congregations worship together at a united morning service in January each year during the Week of Prayer for Christian Unity. OAK supports children in Uganda through the Cogwheel Trust and raises money for charity with special lunches.

OAK Café is open every week from Mon to Fri. 10.00 am. - 1.00pm in the Hall at St. Mark's Church, Rosemount Viaduct (see map) serving home made soup, light lunches, bacon rolls, tea and coffee. All profits are donated to charity. The café is run by volunteers and additional helpers would be very welcome.