As one of the mods, I will refrain from the snarky post and give you some
vectors for meeting folks in Vegas.

. swing dancing twice a month, friday nights at the Aruba Hotel
. http://www.meetin.org/
. http://www.meetup.com/ (though participation is down since they started
charging group organizers to use the site)
. the alternative newsweeklies for other ideas:
http://www.lasvegasmercury.com/
http://www.lasvegasweekly.com/
http://www.lasvegascitylife.com/

If you are looking for shows/concerts, your best option is to check out the
alternative newsweeklies (links are above) and search pollstar.com.

Off the top of my head, Divebar and The Double Down may be of interest.

YMMV - HTH!