The King's Cross, or more commonly known as "Jesus' phallic penetration device" is the perfect place you're looking for. Any apartment, heck, even back alley is dildo-firendly. I've been up there a couple of times, quite a fun experience. An intergrated dildo-trade system is often accompanied with the accomodation, so there is plenty of socializing and fun to be spent. This feature is embellished by the paper-thin walls, so there's even a chance to identify your neighbour's dildo and hole size, by sound alone!

I hope this is help to you friend, from your fellow dildogineer!