If there is any truth to the old saw that you can judge a man by the company he keeps, then George Duke will come out alright. The veteran keyboardist headlined the final evening of the Hollywood Bowl's 2005 jazz series, a presentation entitled An Evening of Jazz Sophistication with George Duke & Friends. Among Mr. Duke's friends performing this evening: Billy Cobham, Kenny Garrett, Roy Hargrove, Bobby Hutcherson, Christian McBride, Airto Moriera, Dianne Reeves and Joe Sample. On hand