Jackie - I think I remember seeing something about tea dances at the Colombo centre. It might be worth giving them a call (I don't have the number on me but it is in the Health and Leisure section of the website). The Colombo centre is on Colombo street just off Blackfriars road.
magoot - repeat of post in the social thread : the Oak is opening at w/ends as an experiment and the lunch we had last Sunday was very good 'British pub' type fare. Roasts at £6.95 inc veg, very good portions, well cooked. Puds were great [bread and butter and trifle were both sampled, but can't recall the price]. I think it was the first Sunday they have opened and it was very quiet - but I don't anticipate it staying that way.