Here's what's going on today (Monday, Dec. 17): A couple of great events on this Monday: Jeremy Davis & the Equinox Jazz Orchestra are back in the Westin Ballroom at 6:30 with a "Big Band Holiday Spectacular." Info at equinoxjazz.com. And the Odd Lot has a Christmas-themed improv show at Muse Arts Warehouse, starting at 8 p.m.