Piano Venues in London?

[VenalWinfrey]

I am trying to compile a list of venues in London that have a piano as a fixture, so to speak. This is because I want to canvass them early next month (for work, I'm a musician.) I know a lot of the big hotels have one permanently, and some bars/restaurants, but, rather than go walking searching for each one (which of course I'll happily do) does anyone know of a way of searching for this kind of information?

Any help, as always, greatly appreciated, thanks guys.