Inquire about jazz in London and people immediately think of Ronnie Scott's, the European vanguard for modern jazz. Only the best English and American combos, often fronted by top-notch vocalists, are booked here. The programs make for an entire evening of cool jazz. In the heart of Soho, Ronnie Scott's is a 10-minute walk from Piccadilly Circus along Shaftesbury Avenue. In the Main Room, you can watch the show from the bar or sit at a table, at which you can order dinner. The Downstairs Bar is more intimate; among the regulars at your elbow may be some of the world's most talented musicians. This place is so well known that all visiting musicians show up here along with the diehard music fans. On weekends, the separate Upstairs Room has a disco called Club Latino.