There's a prosperous firm in town called Celebrity Service, which, for a fee, advises just which celebrities are where and when. Subscribers, in addition to newspapers, press agents and high pressure salesmen, often include fan clubs.

If the sidewalk outside a public place is filled with moronic-looking imbeciles of both sexes, grasping autograph books and candid cameras, it's a pretty safe bet someone whom they consider important is inside or expected.

Exhibitionistic hams love it and you can find them with their silly smirking faces at any hour around the clock.

These are some of the places where they hang out:

Algonquin Hotel—Lunch place of the la-de-dah literary set.

Barberry Room—Socialites, for dinner.

Blair House—Broadway and sports figures.

Colony—Top money mob, for lunch and dinner.

Copacabana—Show and sport crowd, at midnight and 2 A.M.

Copa Lounge—Show, radio, sport and press crowd, 12:30 to 4 A.M.