Don't know of one in Sevenoaks, although I will enquire of John Smedley. In the meantime I run one on the Third Friday of each month (the next one being on the 16th. May) at the 'Hare & Hounds', Lower Boxley Road, Maidstone ME14. It is a Jam session where everybody is invited. No fee etc but you will always find a welcome. We have fun and are not stuck up in any way. Come along if you fancy a night out and give it a try.