The quality of the duplicate games is quite high, and they usually fill between 12 and 20 tables - similar to clubs where I play in New York (Cavendish Club - run by 2009 European Champ Bjorn Fellonius; Honors - run by many times World Champ Gail Greenberg). The teaching program is good and well organized.
In the times that I have been there are fewer world/national champs giving playing lessons than in NYC, where Judi Radin, Jacqui Mitchel, Joe Grue, Kent Mignochi, Augie Boehm, Jim Samson, Gil Eisner and many others are intimidatingly present.
Bridge being a partnership game, and top pro's often teaching the very weak, the consistency of the field at Robson's is very good indeed.
The atmosphere is friendly and the situation low key. They are 100 feet from the Putney Green tube station and help with parking if you call in advance. They promise you a game, even if you don't have a partner with you. I have found that in this case it is wise to either call ahead or arrive 20 minutes before game time so that they can pair you with a similarly capable player.
If you play duplicate bridge, you will like this place.