You know you're in a relaxed pub when a cat passes you as you're leaving the gents.
This is exactly what happened when I visited The Grapes on Fairfield Street in Wandsworth, a pub that is surprisingly quiet considering it's on a main road served by multiple bus routes and just a short walk from both Wandsworth Town station and the Thames.
Its whitewashed exterior makes it look like it would be more at home in a quiet country town than a London high street. The interior is just as nice, all draped curtains, rich carpets and ornate bar. The only thing stopping it from feeling truly "Olde England" was the TV in the corner (which was showing some Olympian swimming when I was there).
The real highlight of the pub is its beer garden. As you first enter this area you're met with tables walled with bamboo and roofed from the elements, providing a cosy place to nestle and chat with friends. It's easy to get cramped there though, so it's lucky that just beyond this area there are half a dozen non-roofed tables to make use of, surrounded by plant beds, pot plants and rockeries.
It's not the cheapest pub you'll find, but an extra twenty pence is a small price to pay for friendly service and lovely surroundings. And a cat.