I can recommend
Kensington Place.
It's changed hands since I last visited (maybe even more than once) and is now primarily a fish restaurant. But KP's unfussy brasserie style still puts me in mind of a canteen.
And it has weird acoustics which mean you can't hear the person you are dining with, but you get the whole golf story word for word from the bore on the other side of the room. As in any good canteen.