SketchUp makes this task simple. Illustrated here is a grouping of tables and chairs based upon those found in the 1967-version of Tomorrowland Terrace at Disneyland (note the change of perspective between the two images). For this model I made only one chair, one table, and one umbrella. The replicated elements are given assorted colors, and spaced just as the interior designer would want them. The grouping can be viewed from any angle until the art director is happy. Adding people is actually the easy part, for any capable illustrator, and they can be added in later through Photoshop.
Perhaps, someday, I’ll build the rest of the restaurant to go along with the tables.