Speedy's Cafe is frequently shown in each episode of the show due to it being placed next to Sherlock and Watson's flat. It may be billed as being on Baker Street, but it is in fact on North Gower Street in Camden. And you can go and enjoy some food and drink there yourself, on their Twitter page they describe themselves as having "fresh food at excellent prices". The interior is even still painted the same as it appeared in Series Two of the show.