Blues singer Joe Williams, Saturday night at Sandy's Jazz Revival (922-7515) in Beverly.

Jazz and swing music 'Summerthing' concert, Friday, noon at Copley Square.

Con Brio, Friday and Saturday nights at 1369 Jazz Club (491-9625).

Fred Buda's Big Band Sound, Saturday at 8 p.m., Boston Common.

Boots Maleson & Friends, Friday and Saturday nights at Michael's Pub (247-7262).

Molly Malone, Friday at The Back Room at the Idler (354-9489).