Former GUNS N' ROSES members Izzy Stradlin (guitar) and Duff McKagan (bass) joined ex-GN'R drummer Steven Adler and his ADLER'S APPETITE band for a couple of "Appetite for Destruction" numbers during ADLER'S APPETITE's headlining appearance at the Key Club in West Hollywood, California Saturday night (July 28). Although Slash did make it to the venue earlier in the night and had every intention of playing with Adler, something reportedly came up that forced him to leave before he could go up on stage and jam with the other guys. As expected, GUNS N' ROSES' lead singer Axl Rose was a no-show at the event , which was meant to celebrate the 20th anniversary of GN'R's classic debut.A photo of Stradlin and ADLER'S APPETITE, taken during soundcheck at the Key Club before yesterday's performance, can be viewed at this location. Although Rose did not make an appearance at the Key Club gig, Adler recently told GuitarWorld.com that a full reunion will eventually happen. "Axl and I spoke to each other in Las Vegas recently, and I know there's a chance," he said. "It's just too big. "Whatever the STONES make when they play, we'd triple it. It'd be ridiculous not to do it. He can't be that goofy." As previously reported, Rolling Stone magazine will honor the twentieth anniversary of "Appetite for Destruction" by looking back at the sex, drugs and Aqua Net that went into the making of GUNS N' ROSES' legendary debut. Click here for an excerpt of Brian Hiatt's cover story, and here for a photo gallery that catches Axl Rose, Slash, Izzy Stradlin, Duff McKagan and Steven Adler behind the scenes throughout their late-'80s/early-'90s heyday.