Among those participating will be Paul Shaffer, Tom "Bones" Malone, "Blue" Lou Marini and Matt "Guitar" Murphy and, although the theater won't confirm anything, it's a pretty good guess that Elwood Blues (aka Dan Aykroyd) will be in attendance. The show is being produced by Aykroyd and the late-John Belushi's widow, Judith Belushi-Pisano.
Those not in the Chicago area will also be able to participate as the show will be streamed on Facebook.
While the Blues Brothers started on Saturday Night Live and were considered by many as a "comedy act," the fact is that both Aykroyd and Belushi had a deep love for the blues and R&B and showed it in their faithful recreations of numerous classics and the crack band, many of which played on the original recordings.
Here's Elwood talking about the night.