OK, I have opened a group called Diving From Eastbourne (catchy name don't you think?
).
There is no obligation to do anything if you 'join' and, AIUI, the worst that happens is you will receive emails from other members.
I have started the group as "private" which I believe means that only existing members may invite others to join.
If interested, them PM or email me your email addresses.
Please also note - this is not a dive club. It is up to YOU to ensure you are dived up, have the right kit, dive plan etc. Ideally you will provide your own buddy. In short, the usual non club charter booking rules apply. Confirmation of taking a space is to be made direct to the relevant skipper (unless otherwise specified). You say YES then you are expected to pay.