This month marks the 20th anniversary of the Best of Studs Terkel, WFMT’s weekly showcase featuring the wide-ranging programs and interviews that Studs Terkel presented on this station, from 1952 to 1997. Over the next few weeks, we’ll revisit some of the first “Best of” episodes – shows Studs told us he liked best. Tonight, we turn the clocks back to September 20, 1957. The ballroom at the Hotel Morrison on the near west side of Chicago is filled to capacity. Studs is in his element as he hosts a live concert featuring his friend, the gospel legend Mahalia Jackson, with Mildred Falls at the piano.