South's Gon' Do It Again

I got a call from Big Jef Special this week.  He's cooking up something, something to be happening on Wednesdays at Will's South (5825 S. Orange Ave.) which means that there's a throw-down going on tonight.  Starts at 7 pm.  Jef's a troubadour; an American songwriter and some pretty heavy cats have been sitting in with him.  Is it a free-for-all or a house gig?  It's bubbling like lava right now but it hasn't blown yet. (I'd make a gator joke, but I'm tired.)