Visiting Assembly is plenty of fun. What's awesome is that they have a slick website that's constantly updated with information about future events. As an example of slick, check out the upcoming Discotheque & Arcade: Mr Majestic's Cirque de Fantastic. Doesn't the event description sound just awesome? Did you notice that the page links to the individual artist's respective pages with detailed information and a calendar to let you know on which other nights they're playing? I found this site refreshingly different to the outdated and unmaintained sites I often encounter.
Check out their contact page for contact info as well as a map to the venue.
"In true Arcade fashion you’re invited to enter the world of enchantment where you will experience mischievous wonderment in marvelously epic proportions. The magic will course through your body overwhelming your senses, luring and bewitching you into the world of circus carnival, a world of charm, temptation, charisma and splendor." - Mr Majestic's Cirque de Fantastic