There may not be a whole lot of weight to their music, but Matt and Kim are happy as hell. And isn’t that what really matters? They’ll play anywhere—a rooftop in Brooklyn on the 4th of July, the kitchen of a house in Cambridge, a barbecue on Roosevelt Island, the bottom of a cliff on the Pacific shoreline—which means that they’re often without a proper stage and that their audiences can literally be right next to them. If you’ve been to a Matt and Kim show, chances are you’ve seen food fights and instruments knocked over, uncontrollable dancing and lots of singing along.

And, you’ve surely noticed (because it’s impossible not to) how much they smile. They’re kind of like a nonstop party. Ask them, and they’ll agree.

Talking to the two is sort of like watching them play. They’re a little sloppy while they try to stay focused, despite all kinds of interruptions. They don’t stop smiling. They laugh a lot. And “fun” is the operative word in the conversation.

“Kim and I have a ton of fun playing because we love doing it,” Matt says. “Rather than putting on the ‘too-cool-for-school’ face, we just have a good time with everybody. She smiles all the time though,” he adds. “Even if she’s just nervous, smiling is her resort. If she gets really nervous though, she’ll just laugh like crazy.”

They also really love spending “just about every waking minute together,” he admits. “Well, enough time at least that we share one cell phone between the two of us, and it’s never been an issue.”

You’d think that after their recent tour driving and sleeping in a Chevy Astro for months on end, Matt and Kim might want some time apart. Or for someone else to come along with them: But they don’t. In fact, they prefer it to be just the two of them.

“It’s awesome,” they both sort of gush in tandem. “For some magical reason, we get along great, no matter how much time we spend together,” Matt says. “We’ve tried to bring other people on tour with us, but most of the time, they just end up feeling like a third wheel.”

This week, they’ll set out again for several months on yet another tour of the United States and Canada, but not before bringing their “Brooklyn-style show” to the Bowery Ballroom. How their usual antics will translate to this more conventional venue, is something they haven’t quite figured out yet. But Matt and Kim intend to do their best to bring the feel of their favorite borough to Manhattan. “We want it to be like a typical Matt and Kim show that you would see in Brooklyn or a warehouse space. That kind of vibe—cheap, and all ages if possible—with other bands we like; who are fun,” explains Matt. “We really want to make it fun.”

“Yeah,” Kim laughs. “If only we could convince them to let everyone bring their own beer.”

March 9, Bowery Ballroom, 6 Delancey St. (betw. Bowery & Chrystie St.), 212-533-2111; 9, $8.