Become a fan of h2g2
Probably the most popular (and hence the most crowded) shopping district in London. This street houses a magical little shop, which actually forms a front for London's most vicious Gangland criminals. It's a small tobacconist shop, with shelves that reach to the ceiling, and hide the catacombs of the criminal underworld behind them. There are many different levels of security passwords which will get you certain places at the negotiating (or gambling) table backstage. The most powerful, however, is "A Half Ounce of Black Cherry Rolling Tobacco and a Pack of Red Rizlas Please". This gets you straight to the Don, which is a bit of a problem if what you really want is A Half Ounce of Black Cherry Rolling Tobacco and a Pack of Red Rizlas. Many an unsuspecting tourist has given up smoking in this way.