See https://news.ycombinator.com/item?id=7988018. Basically, this is a warm-up event for the Startup School day on the 26th. GrantTree will happily provide the space (up to 100 people or so) and ample beer. Depending on numbers, we may also get food (Pizza?) and even a beer barrel! Pleaes register your interest so we have some clue how many people are coming!