1) A Soho Walk Up is a flat at which a prostitute works. You walk up to the flat, pay the agreed amount do your thing and leave. Usually guarded by a "maid", an older british woman. Found in the Soho section of london.
2) Phrase used to confuse travellers to Great Britian.
1) If you know where to go you can find a list of all the great Soho Walk Ups!
2) Mate, you know the beers better at the Soho Walk Up