For the past three weeks the road show has visited Glasgow, Birmingham and Leeds, offering free gaming to people in each city.
In London 60 consoles will be open to the public at the Mercer Street Studios in Covent Garden from 10am to 6.30pm on Friday and Saturday and from 10 am to 7pm on Sunday and Monday. See map here.
"This is a great opportunity for people around the country to put the Xbox 360 through its paces and judge first hand whether it lives up to their expectations," said Stephen McGill, head of marketing for Xbox at Microsoft.
Those gamers who turn up will be allocated a 30-minute slot during the day and will get to try out the latest versions of existing games optimised for the new hardware as well as new titles.
Available titles include Perfect Dark Zero, the prequel to the award-winning first-person shooter Perfect Dark, Kameo: Elements of Power, a mystical action-adventure game, and the latest in the Project Gotham Racing series.
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