There is also:
Barnt Green Sailing club,
www.sailingbarntgreen.com/
Bartley Sailing club,
www.bartleysc.co.uk/
or if you don't mind going a bit further and sailing in a Capability Brown designed landscape there is always Ragley Sailing club (although I must declare an interest),
www.ragleysailingclub.org.uk/
. We are a very friendly club, with an active mirror fleet which is a lot less competitive than Shustoke or Bartley.
Good Luck
Andy J
Commodore, Mirror Captian, Ragley Sailing Club