The best place to row on the Thames is at Richmond, renting a boat from Richmond Bridge Boathouses who have occupied a prime spot there for years.

http://richmondbridgeboathouses.co.uk/

Hyde Park has a fleet of rowing and pedal boats which operate on the famous Serpentine and the UK's first Solarshuttle, a magnificent vessel which glides silently across the lake powered only by the sun.

Located in the heart of London’s Docklands at the west end of Millwall outer dock, the Centre is based in an award winning purpose built facility with great views from the upstairs bar over the dock, and wet facilities downstairs.