They aren't best friends, but House, Chase and Foreman go out together during the episode "The Choice." They even sing some karaoke.
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Here's a scene we never thought would take place on House: House, Chase and Foreman take to the stage for some karaoke.
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This patient lost his voice during his wedding ceremony. In this scene, House looks into the problem.
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Adam Garcia guest stars on the 5/3/10 episode of House. He plays the show's patient of the week.
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Taub and Thirteen talk with a patient that lost his voice during his wedding ceremony during this scene from House. It's from the episode "The Choice."
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Chase, Foreman and House singing karaoke?!? This unusual scene takes place during the episode of House titled "The Choice."
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House Season 6 Episode 19 Quotes

House: I woke up in the wrong bed this morning.
Nurse Jeffrey: Any bed you're in is the wrong one.
House: That's not what your mama said. Oh! Snap.
Nurse Jeffrey: I'll be going now. To Human Resources.

Dr. Wilson: Just think of this as a dream.
Sam: What about House?
Dr. Wilson: I said a dream, not a nightmare.