CNBC – In an age of austerity, the appeal of making a quick buck often sees people turn to gambling. But in the U.K., there are increasing calls for a certain type of gaming machine – which some critics have dubbed the “crack cocaine of gambling” – to be banned. Fixed-Odd Betting Terminals (FOBTs), also known as B2 machines, allow gamblers to play games such as roulette at high-speed and with relatively high-stakes in their local betting shops. There are currently almost 33,400 of these machines in the 9,112 betting shops across the U.K. A punter can feed a maximum…