Ten Mayfair galleries worth the walk (and the wine after)

I spend most Saturdays dragging some poor friend round these rooms before we argue over lunch about whose carbonara wins. This isn't an exhaustive survey \u2014 I'm a wealth manager, not a critic, and I say that with the appropriate humility \u2014 but it's the circuit I actually do, on foot, between Clerkenwell and W1, usually with something decent lined up for afterwards. Ten stops, no filler, no gallery that makes you feel you've wandered into someone's tax write-off.