I used to live in a flat by Builders Arms years ago and am delighted to read from this post above that it is still there. What a nice memory. Another idea for a cosy sofa pub is upstairs at the Chandos Trafalgar Square / Charing Cross Road, and also the pub at the south end of Charlotte Street a small pub with a similar cosy upstaira area. I must admit I am reading the above with interest. A walk along the river can never be a bad idea. There are some river boat bars too by Waterloo Bridge North end, and also one on the Battersea side of the Battersea and Chelsea Bridges. May I also recommend the book 1,000 things to do in London, because it's fab.