there isn't anything officially organised, however a lot of people will from time to time, set up friendly cups. these are run amongst ourselves, by ourselves using the monday friendly games.

if you have a look on the grid iron discussion forum there are often cups being formed there, or alternatively on go to your regional forum there's sometimes ones being held there.

Or, if you are feeling really brave, host a cup of your own and open the invitation to whoever you wish

good luck