Regarding weck: when the Buffalo Wild Wings chain started, it was actually BW3 ("Wild Wings and Weck"). My dad went to the one in Muncie, IN to check it out; their version appeared to be Steak-umms on a salted hamburger roll (no caraway seeds). And when he asked for horseradish, the waitress stared at him for a few seconds and then asked, "You're not from around here, are you?"
I believe they dropped the weck attempt shortly thereafter...