They used a total of three bars, I think. The Officer's Club at Naval Air Station North Island on Coronado, the Kansas City Barbeque, and The Windsock on Pacific Highway. (The last has been demolished since Top Gun was filmed.)

In the final scene, Kelly McGillis is standing in a trench because she is taller than Cruise.

Any more odd trivia you think I don't know, Unit? *G*

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