The Spare Room at the Hollywood Roosevelt Hotel is a study in upper-crust drinking. It's the kind of bar that would be at home in F. Scott Fitzgerald's "The Great Gatsby"; its patrons are often as dapper as that great writer and just as ambitious. In other words, the Spare Room is where young Hollywood does its fair share of seeing and being seen. Oh, and it bowls there too, at one of two shiny lanes overlooking Hollywood Boulevard. Which is why it's fitting that the Spare Room has launched a Wednesday evening special from 6 to 9 featuring $5 mini lobster rolls, half-price bowling, $3 cold beers and a $7 concoction called the Nantucket Sound. The summery drink, made with fresh-pressed cantaloupe juice, gin, vermouth, ginger sorbet and bitters, is an East Coast elixir worthy of another era.