Harp Jam Group

I'm trying to get a small group of harp players in the area together to jam, talk harp gear, share etc. Any tips to help us get going? Most of us are intermediate at best but interested in learning and improving. Thoughts on size, frequency of get togethers, backing tracks or 'live' guitar, just play or agenda?? I think we want to keep it casual at this point but recognize that the only time we see each other is at the local jams which tend to be guitar, vocals and band focussed. All ideas welcome.

Thanks in advance