"This group is really, in a lot of ways, the who's who of jazz music worldwide," says Clark Gibson, who will groove onto the Walton Arts Center stage at 7:30 p.m. March 5 as part of the Starrlight Jazz Club. The quintet of jazz masters is made up of Gibson, Lewis Nash, Sean Jones, Pat Bianchi and Michael Dease, and joining the group will be special guest Nick Mancini, who was a late addition.