OT: anyone know of a good Tia Chi class don't traditional?

[Technomage]

  I've been pouring over Dex and Google and so far, I haven't found any 
good ones.
I am in need of some balance training. seems my eyes have been giving me
problems (I've been legally blind for 20 years and it looks like I might 
be total
before this year is out).   I am already using VoiceOVer as a 
replacement for
not being able to read large print ( that's an OS X thing). At least it 
works with
virtualbox and I can actually hear the terminal prompt in the Linux 
guest. anyway, t
hat's a bit outside my point of interest.

I know this may seem a bit of a stretch asking in a lug for something 
not even lug related,
but i am a bit at the end of my rope. just about every place I've tried 
sounds like snake oil to me.

what say the rest of you?