Star sightings include Sugar Blue, Bonnie Koloc and Mancow Muller

SEEN ON THE SCENE: En route to the Rock ‘n Roll Hall of Fame in Cleveland, Grammy winning harmonica whiz Sugar Blue dropped by Hubbard Inn to see Bonnie Koloc the other night — played a couple of songs, and requested one from Koloc, who sang one about Amelia Earhart’s last flight. Appropriate since Koloc won’t get on a plane — and Earhart’s has never been found! … Mancow Muller and his family were seen dining at Nick’s Neighborhood Bar & Grill in Wilmette. … Actors Archie Kao and Tim Chiou were spied hanging out at Rockit Bar & Grill.