Tonight at the Steel Yard (27 Sims Avenue) is the annual Halloween Iron Pour.  The party gets kicking at 6 PM, and the iron will be flowing from 7 - 8 PM.  Live music starts at 8 PM.  Here's more details. $5 cover.

At 11:55, Check out the Midnight Organ Recital: Mark Steinbach, University Organist at Sayles Hall (on the Main Green, accessible from Waterman and George Street) With works by Bach, Franck, Messiaen, and others, this is sure to be a creepily wonderful event.  Plus, it's free!  Bring your own pillows and blankets.