Alt beer on tap

Members of my homebrew club, the Chicago Beer Society, have teamed up with our local Rock Bottom Brewery to brew a Dusseldorf Alt,which they will be tapping tonight at 6pm. Roger Deschner, one of the homebrewers involved, writes in an email,

A proper altbier as found in the brewpubs of Dusseldorf is normal gravity, copper colored, malty but dry, and quite hoppy. It's a wonderful session beer, that can make you happy that you're drinking alot of beer.
Most people make it wrong - brown, sweet, and strong -yuck!

I'll be there at the corner of Grand and State to sample it and post a review here.