Have been on zillions of corporate days close to the M25! The Grove offers awesome service and weather report on the first tee, only downside if they do lunch in private rooms a mile away from the clubhouse and it feels like you are eating in the boardroom - the bar has true wow factor though. The London Club, Stoke Poges and Wentworth all wow factor corporate venues. New course at Luton Hoo - haven't played it so not sure what its like. Also Foxhills, Bearwood Lakes both offer good service and great food.