At Bowmoor, racing is held every Sunday. Racing is rarely cancelled, though it does depend on wind (no wind or force 8 usually makes the OOD think twice).
During the summer there are three races and the third race is currently for "Race Improvers" - a chance to experiment a little more with technique.
Also during the summer there is a Wednesday evening series which is still keenly raced, but a better introduction for the less experienced sailor.