D.C. sporting events aren’t known for their celebrity power, but this week seems different. Twenty-four hours after Joe Biden brought down the house during a Wizards-Hawks playoff game, the Caps hosted a veteran A-lister of their own: David Letterman.

Who appears to be growing a playoff beard.

That he started in 2014.

” You know what?” Letterman told the Whitefish Review in 2015. “I used to say, every day, ‘I am so sick and tired of shaving.’ I had to shave every day, every day, for 33 years. And even before that when I was working on local TV. And I just thought, the first thing I will do when I am not on TV is stop shaving. And everybody hates it. My wife hates it. My son hates it. But it’s interesting. I’ve kind of developed a real creepy look with it that I’m sort of enjoying. And I can tell that people are off-put by it. And the more people implore me to shave, the stronger my resolve is to not shave. So the day that I shave, I’ll call you.”

Letterman — sitting close to the ice, and not wearing obvious colors of either team — was shown on the big screen during the first period. The Caps played Warren Zevon’s “Werewolves of London” during that video; Zevon was long a favorite of Letterman’s in his late-night years. Letterman pumped his fist in enthusiasm. For life.

UPDATE: Here is an interview I conducted with Letterman early in the third period, as he was attempting to return to his seat.

Steinberg: I wanted to ask why you’re here and who you’re rooting for, I guess.

Letterman: Well, the second question — who do you think we’re rooting for?

Steinberg: I really don’t know.

Letterman: It’s the Capitals. I went to school with Ovechkin.

Steinberg: Oh, you did?

Letterman: Yeah, I did. We were roommates at Ball State.

Steinberg: Oh, cool.

Letterman: Yeah.

Steinberg: So who do you think is going to win?

Letterman: I still think the Capitals are going to win.

Steinberg: I still don’t know why you’re here.

Letterman: Well, why are you here?

Steinberg: They make me come. Honestly, I’m sitting downstairs because someone took my spot upstairs, so I’m not even watching the game. I’m here talking to you.

Letterman: Well, we’re talking to you. Thank you, nice to see you, good luck. Roommates, two years, Muncie.

Steinberg: What did he study?

Letterman: Home ec.