JONATHAN RAY seems to be making up for lost time. Despite giving up booze every January, he ended up in a bit of a haze' during a recent stay in Venice to sample Prosecco, and this week, throws his heart and soul into a cocktail class in Brighton: With regular sampling, I get confused as to which cocktail is being made. I am not alone.' Ray passes his multiple-choice exam at the end of the class, although he admits that it is not exactly conducted under exam conditions... one student raising his hand, not to ask how much time we have left, but to order another strawberry and balsamic Mojito'.