The Disco Biscuits celebrated Halloween at Bostons Orpheum Theatre the second year in a row last night. The entire evening took on a formal theme, with the quartet wearing back suits and using classical selections from Walt Disney’s Fantasia to tie the evenings setlist together. Early on in the night the group also busted out bassist Marc Brownsteins Jamillia for the first time since September 30, 2003 and then offered a complete reading of guitarist Jon Gutwilligs Hot Air Balloon rock opera. The long dormant opera, which has only been played 8 times since 1998 and hasnt been performed in its entirety since January of 2004, includes popular Disco Biscuits selections like The Overture, Once The Fiddler Paid, Voices Insane, Bazaar Escape, Above The Waves and, of course, Hot Air Balloon. The Disco Biscuits will appear at Albanys Palace Theater this evening.