Low temperatures in Las Vegas have crossed into the high-50s (ºF) … which means it’s holiday charity season in the Valley, and some in LA.

One of the more fun events gets started in a couple hours at the Golden Nugget (which seems poised to take over from the Hard Rock as the primary LV charity destination) … so if you’ve got nothing better to do this afternoon than get warmed up for some Vegas Halloweening, why not help out the soldiers while mingling with some big-time MMA, small-time Hollywood, and mid-tier poker world:

Operation All-In
benefitting Xtreme Couture GI Foundation
organized by Randy Couture and Karina Jett
2 pm

$225 buy-in, $100 rebuys
1st prize $10k

I had a blast at this event last year, not because I “moneyed” to score a Full tilt swag bag for my 30somethingth-place finish … but just because it was just more fun than the usual charity show. For the more casual player, it’s the only time you’ll see MMA strongmen somewhat intimidated by scrawny poker geeks while entertaining the festive-drinky feelgood tourists … many who can’t seem to believe they are “in the ring” with so many people they’ve watched on TV — all for a tax-deductible donation less than they were planning to drop on a single sitting at a smokey $5 blackjack table.

A buy-in to this event also gets you in to Randy Couture’s Halloween Bash this evening at the Golden Nugget’s surprisingly undouchey nightclub Gold Diggers.

More info here.

Post to be continued … so check back later, but wanted to get the word out in time for Vegas peeps to head downtown before the end of the rebuy period.