The AA is Britain's oldest school of architecture, but anyone can take advangte of the great work going on there. You can catch really interesting public lectures and free exhibitions throughout the year. There are also occasional installations and event launches, a bijoux cafe and brilliant bookshop. A great place to hang out with the builders of the future.
A traditional pie, mash and liquor shop in south west London that is run by the latest generation of the Harrington family who opened it in 1908. It looks like it hasn't changed since the day it first opened but it's a place with absolutely no pretentiousness to it at all, this is unapologetically working class and down to earth. If you want an overpriced cappuccino and wi-fi there's a Cafe Nerro down the road but if you want fantastic traditional London food you won't find anywhere better in the city. They even do pie and mash to take-away. I just wish it wasn't closed on Sundays.
The best place for a glass of wine*. It's the perfect balance – not too formal, not too informal either. Food is consistently good. Lamb's Conduit Street is a little oasis in the midst of Bloomsbury. (*slightly overpriced)
If you like some nice cool beer, portuguese sweets (the once with yellow custard inside) tasty and affordable sandwiches, good strong coffee and football, at all hours. Max Snack Bar is worth checking out.