I searched not long ago googling folk music and Las Vegas
and found a few ...
it seems there is a library or folk club where performances
are held...
no doubt you could find some folkies by frequenting such events.

http://www.nightonthetown.com/entertainment/html/body_acoustic___folk_music_events.html

i see you already found this meet up place
http://mixmaking.meetup.com/19/
did you see this post that was put up right after yours?

I would like to have a meeting soon--p[lease call me at 234-4070 between 4 and 8 pm weekdaYS, ANYTIME ON WEEKENDS! Let's get together--! Let me know when is good for you! Ayesha"

A summer folk music festival on the grounds of Greystone Park Psychiatric Hospital will pay tribute to one of its most famous
former ...woody guthrie...