Neil Patrick Harris is a big fan of Sleep No More, the exhilarating, immersive theater piece that's taken up residence in Chelsea for the past few years. And on Monday, he made a cameo appearance at the "McKittrick Hotel," Sleep No More's sprawling performance space (as part of an event for Citi ThankYou cardmembers). We were allotted six minutes to chat with NPH about the interactive experience, along with a few of his other (many!) upcoming projects and the sad, sad end of How I Met Your Mother.

This isn't your first time doing Sleep No More, yes? I did it a few years ago for fun, just to do it. And I did just a small part of The Porter track. It was part of the hotel side of things. It was super intense and really exciting and mentally mind-effy. So I’m happy to be back.

What is it about an immersive experience like Sleep No More that you like as an actor? It’s the same and yet every show is going to be different because there’s a different audience and sometimes they will follow you while you’re performing. And I’m speaking for people I don’t know because I’ve never done it, but sometimes fifty people will be watching you do a scene and, on another note, only two. And sometimes they’ll be rowdy and sometimes they’ll be quiet and, hopefully, always respectful. But I think you have to get into some kind of zone. The [actors] are downstairs and they’ve been downstairs for an hour and a half already doing physical warm ups of a really intense sort. They’re like a tribe of people. That inspires me.

You’ve seen the performance a number of times. What is it like, as an actor, to walk into something like Sleep No More as a participant? It's magnificent. Everyone wears masks, so you’re totally anonymous as you wander around, but it really frees you up to observe more with less abandon. No, with more abandon, right? Because you can be more voracious if you’re really into something. You can really feel it and not have to worry about people observing you feeling it. Which I suppose might be unique to me.

What role are you playing tonight? I’m "Man In Bar." I’m going to be welcoming everyone and making them feel comfortable before their experience. So, I’m not really doing—these tracks, they’re ridiculously talented. They have to learn dances, fight choreography, and all kinds of things, and I don’t have the time to do that.

And you’ll be going back to theater in the spring? Yes, I’ll be doing [Hedwig And The Angry Inch] in March.

Are you looking forward to that? Very much! Though, it’s going be interesting because I’m playing a rock star, but I’ll probably have to live like a monk because it’s kind of a one-woman show and I don’t have an understudy, so I can’t be the, you know, smoking, drinking character that I’m playing. I’ll probably have to leave that on the stage.

How is it, now that How I Met Your Mother is wrapping up, transitioning from doing a TV show to doing theater? Is it the same kind of heavy day-to-day work? It's totally different work. But I’ve been doing HIMYM for almost nine years. I loved it so much. I regret that it’s leaving, but have a good grasp on how it works, so it’ll be fun to take on a new challenge of something that I have to start from scratch with.

You’re a jack of all trades now. This is the year of TV, theater, and film [with upcoming films Gone Girl and A Million Ways to Die in the West]. How is it working in film? It’s going great. I got to work with Seth MacFarlane, who’s kind of the top of his game in comedy. And then with David Fincher, who’s at the top of the game with drama. And both parts are super different and I’ve had a blast doing both of them, so I’m very lucky this year. I wish I could see my kids with more regularity. But there will be spells of calm, I’m sure.

Everyone’s very excited about Hedwig. How did you end up choosing to take on that role? It was pretty ground-breaking back in the early 2000s. I was a fan of the part and they sort of circled around towards me, two, three years ago. I was very interested, but said I couldn’t do it because of time constraints. I could’ve probably started first preview the day that I wrapped HIMYM, and then went all the way until we started next season. But you’re so burnt by a whole season of HIMYM that you just need a little time to just decompress, so it didn’t feel like anyone would have won in that design. They were willing to wait.

How does it feel to be ending HIMYM after 9 years? It feels great! I mean, it feels not great to be ending it, but I think it ran its course in a perfect way and I think this final season has been a joy to do and I’m glad that the audience members and fans are watching it.

Are you planning to do more theater in the future or do you think you'll start focusing more on film? Film, no, I don’t really think that far ahead. I know I’m booked until next October [laughs]. I have to think a little bit ahead. No, I’ve got so much on the plate at the moment and all of it is amazing stuff, but I don’t have any bigger, larger master plan just yet.

Are you staying in New York? I'll be home basing in New York. Gotta put my kids in school somewhere.