Starting After school clubs at primary schools

I run a local martial arts centre in the area . I am looking at opening after school clubs at the local primary schools at least one a night 3.30pm - 4.15pm at a cost of £3 per student . I need someone to call all the local schools and try and get us into the schools to start the after clubs . We are crb checked and already teach to over 100 children in the area. We can do the after school clubs in six week programmes