Possible Clues:

• Large room, one we organised to show scary movie
• Night of October thirty-first
• Time for children to tour neighbourhood -- mostly permitted when woman's about
• Large room, one we alter for scary festival!
• Henry is down taking drugs in middle of canal - that puts the frighteners on everyone once a year?
• Bird holds everyone to be in debt at the end of October
• An opportunity to go door-to-door for nutty types with hospital licence for half a screen
• Evening before All Saints' Day ( 9)
• Hotel to permit central screening at the end of October
• When childish tricks are played in college, one we wrecked