There is a video game from Sega called Crazy Taxi, in which you drove a taxi all over a city in a haphazard matter to earn bigger money and tips from your fares. But that game pales in comparision to this movie, the true "Crazy Taxi".
Barry Evans (who would ironically live his last years driving taxis after a succesful career as a British-sitcom star) plays Joe North, a taxi driver in London who is the subject of the adventure. There's no real plot, just him getting into all sorts of sexual situations with women of varying degrees of beauty. We see him talking into the camera to the audience about his plans to woo the women he meets into having sexual encounters with him.
Evans is pretty good, about the same as Christopher Neil would be in the next two films. Stephen Lewis (Inspector Blakey of "On The Buses" fame) has a small role as a doorman in a strip club. The aging Diana Dors plays Joe's mother. An O.K. timewatcher, but it's quite titalating at times (talky too). Bravo (The Canadian version) loves showing these 70's British sex comedies; they've shown three "Adventures" movies.
For some reason, they borrowed a bit of Sesame Street's theme song's music to create theirs.