Silicon Milkroundabout http://www.siliconmilkround.com
Hacker News http://www.meetup.com/HNLondon/
London Software Craftmanship http://www.meetup.com/london-software-craftsmanship/
Hackathons & Jams http://www.meetup.com/UK-Hackathons-and-Jams/
Some places to work late nearby or slightly further afield:
Aobaba 57 Kingsland Road, E2 8AG http://www.aobaba.com Opening hours: Daily 11am - 11pm Comments : Open late, really quiet, decent enough wifi.
Barbican Arts Centre (Camera Cafe & Bar) Silk St EC2Y 8DS http://www.barbican.org.uk/restaurants-bars/opening-hours Opening hours: Mon–Fri: 8am–10.30pm; Sat & Sun: 10am–10.30pm Comments:
Full Stop Bar 202 Brick Lane E1 6SA Opening hours : Mon - Tue: 07:30 - 18:00; Wed - Thu: 07:30 - 23:00; Fri: 07:30 - 00:30; Sat: 09:00 - 00:30; Sun: 09:00 - 21:00 https://www.facebook.com/fullstopbar Comments: Despite being a bar, there appears to be a cafe attached that is open til late.
Look Mum, No Hands! 49 Old Street EC1V 9HX Opening hours : Mon–Fri 07:30–22:00; Sat 09:00–22:00; Sun 09:30–22:00 http://www.lookmumnohands.com Comments: Bike friendly, wifi a little hit and miss, food and drink is a little pricey, but has a nice vibe.
Shoreditch Grind 213 Old Street EC1V 9NR
Old Street tube exit 8 Opening hours : Mon–Thurs 7:00 - 23:00; Fri 7:00- 1:00. Sat 8:00 - 1:00. Sun 9:00 - 7:00 http://www.shoreditchgrind.com
Comments: No wifi in the evening.