Here’s the dinner menu Rock Island used at the 1948-1949 Chicago Rail Fair. Dinner was $3, or about $30 in today’s money.
The entrées included breast of guinea hen (the same hens that donated legs to the lunch menu?), beef mignon, chop grill, and braised veal. These came with soup or fruit cup, appetizer, lobster Newburg, potatoes and vegetables, salad, a choice of seven desserts, and beverage. I suspect this was a more elaborate meal than Rock Island planned to serve on the ill-fated Golden State Rocket.