A NEW fashion haunt is born: the Atlantic in Piccadilly. In the first week of opening, John Galliano and his gaggle of model friends were thrown out of the new bar- restaurant for putting their feet on the tables, swearing and for generally unruly behaviour. Then Kate Moss was spotted and the magazines who lunch promptly adopted it as their favourite hangout. Last weekend, the Scottish actor John Gordon-Sinclair was seen having dinner with Jane 'Bubbles' Horrocks. Perhaps she was doing some research. The place is absolutely fabulous, darling, after all.