- And then what did you hear?
- Cocktail party.
- What?
- Drove through what sounded... it sounded like a cocktail party. There was chattering. It was right at the end.

20 seconds sound clip from the Sneakers movie soundboard.

You can hear this line at 01:14:49.260 in the Blu-ray version of the movie.

Quote context

[...]

- Lower. Lower.

- There was a recurring sound.

- Like seams in the concrete.

- But further apart. Yeah.

- Now what?

- Bumps. Rough ones.

- Railroad tracks.

- Yeah, yeah.

- A right on Antrim and a left on 84.

- And then what did you hear?

- Cocktail party.

- What?

- Drove through what sounded... it sounded like a cocktail party. There was chattering. It was right at the end.

- Great. Now we gotta look for a cocktail party on the other side of the railroad track.

- Wait, what's the exit where the railroad tracks are?

- Crescent.

- Mother, stay on Crescent, get off at the reservoir.

- Okay.

- There's a cocktail party at the reservoir?

- Yeah. Yeah.

[...]