ChoicesUK is selling "The Club" for the Xbox 360 for £17.99 (inc Del.)
You can get cashback through the usual sites (e.g. 5% Quidco, making it just £17.09)
The next best price seems to be £22.99 from ShopTo.
The Club mixes the best elements from action shooters with instant accessibility and is the most innovative shooter seen on the next generation of consoles and PCs. Featuring the relentless pace and attention to detail of racing games, with a story structure based on fighting games, players will choose from eight gladiatorial misfit characters to fight in a shadowy underground blood-sport known simply as The Club. Controlled by faceless, obscenely wealthy and an influential elite, each character has their own reason for risking their life to “beat” The Club. Some are driven by greed, some are adrenaline junkies, and some are driven by pure insane bloodlust.