dr.tran, not that I think yet another local group is needed, but...
as a member of meetup.com, I noticed about 30 local people
wanting to form a meetup group on that system, so you might
want to register and check it out. unfortunately, meetup group
mediator sections are not free, but it might be a good place to
get established since nobody is doing it yet using that medium.
keep in mind that freshwater planted tank interest is only
a small minority of people doing any aquarium related hobby.
this is why it's best to join a large established group, doing
occasional planted tank stuff, then trying to start your own.
honestly; you'll learn a hell of a lot more searching and reading
and posting on dedicated forums like this, then any local group.
I know there are fabulous groups in other major cities, but for
some odd reason, NY simply does not promote planted tanks.