Has January turned you into a go-getting, life-changing achiever? Not yet? There's still time. But if your best intentions start to look a little out of reach you might prefer to follow the old-school maxim "charity begins at home." These 10 London businesses all have a cause to support, and are a pleasure to get involved with. Eat, drink, shop, and be merry, safe in the knowledge that you're doing just a little to change the world.