The River Ale House

You're in Greenwich, down by the water, and this is the kind of pub that actually feels like a proper local rather than a tourist trap—even though it's perfectly positioned for riverside walks. The River Ale House takes its beer seriously without being a beery bore about it; the cask ale selection is genuinely impressive, and the staff know what they're talking about without the smugness. It's got that comfortable, lived-in feel where you can nurse a pint for an hour or pop in for a quick one after work, and nobody's going to judge you either way.