What could be better than a rousing sing-along at the end of a set? Put one of the sing-alongs on the floor of the Middle East nightclub.

That’s exactly what Ages and Ages, the Portland folk rock band, treated the crowd to on Tuesday night.  The first of two sing-alongs was a plugged-in version of “Divisionary (Do The Right Thing)” and, in the many variations of it you can find on the internet, there’s really nothing quite like being in the room while the band does its thing.

Tim Perry is the lead, but he’s supported by a band that enriches the sound — and on “Divisionary” it’s only augmented when the crowd gets into it. As Perry said in an interview with Allston Pudding, anyone can be in Ages and Ages. But back to the band for a second: Sarah Riddle and Annie Bethancourt provide such great backing harmonies. And they’re not just harmonizing with Perry’s voice, they’re singing different lyrics: “I hear a higher calling…” while Perry sings “Do the right thing…” It really makes one think that it’d be impossible to hear Tim Perry do a solo acoustic show without it feeling like it is missing something. The added complexity is appreciated.

And the band has such a great on-stage chemistry, cleverly pretending to pretend that they aren’t getting along, while making snide comments about each other. And, a late in the show mention about merch came with a discussion about Spotify. Just leave Ages and Ages songs on repeat on the streaming service overnight, Perry said, and they will eventually make money someday.

It truly feels like this is a band that gets along with each other and enjoys spending time together in a van for weeks on end. Imagine spending a month with even the best of the best of friends: it could make the most positive people break. It’s a blessing that hasn’t happened yet.

And, in the best kind of form: the show ends on the darkened floor of the Middle East. The band, surrounded by the crowd, stood in a circle and played “Ante Up,” and got the crowd providing hand claps. A wonderful way to cap off a night.

The first opener was New York’s Golden Bloom — and they themselves ended up on the floor for their closing song, imploring the early folks to indulge in “whoa-oh-ohs” to accompany their Americana/rock sound. The band was joined by members of Tallahassee — and had that gone unmentioned, no one might have noticed unless they were eagle-eyed fans of either band. And that’s a comment on how put-together their sound was.

Mount Peru was the direct support for Ages and Ages. Hailing from Somerville, the band’s frontman combatted what seemed like a desire to not want to be playing a show or to have to tune a guitar that night by playing a set of competent rock and folk tunes. While tuning, frontman Thom Valicenti would sigh and express contempt for his guitar’s G string, prompting a backing vocalist to say “ain’t nothin’ but a G string.” That was funny. But it’d be even better sold if the band felt like it had more to offer than to just show up.

See Ages and Ages tour dates here.