All Zero Hour events take place at The Dome.

This is a large dance space above The Boston pub, directly opposite Tufnell Park underground station. The entrance is on Dartmouth Park Hill.
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Tufnell Park station is on the Northern line, two stops north of Camden Town. You can also travel by bus, on routes 134 and 390 (both 24-hour service, with buses running every 15 minutes during the night), route 4 and night bus N20.
For more bus information, click here.