Bay seniors might be curious to know that tech entrepreneurship is not the only innovative activity happening in Mid-Market. The Center for New Music on Taylor celebrates its second annual Festivus on Dec. 6 and 7 at 7pm. Eight cutting edge local jazz bands will be performing. Their names alone are enticing – the Klaxon Mutant Allstars, the Weiner Kids and Romus’s Life’s Blood are typical. There’s a bar and, curiously, a cookie potluck. $10.