Last night Rec Hall might not have been completely full of people but the sounds of Guster filled the entire building and left fans and those only recently introduced to the Boston-based group — many soon-to-be followers — full of appreciation for the trio.

Guster only has three members, but that was more than enough for the small group who sounded like they had been singing together since infancy.

"Well, aren't we a spirited bunch this evening," lead singer Ryan Miller said as the band greeted the meager but eager crowd of about 650. Concert goers took up about one-third of Rec Hall's floor, pushing close to the stage, while those sitting in the bleachers enjoyed the concert with more arm room and plenty of seats to pick from.

It's a shame that more people didn't show up to see this band. While the crowd had a good vibe, the energy that Guster produced was enough to blow the roof off of a much larger venue, which the group could easily be doing in the near future.

Miller and backup singer and guitarist Adam Gardner have such an amazing vocal combination that they sound like brothers. Their harmony in "X-Ray Eyes" was right on key.

And of course, what would Guster be without its insane bongo maniac, Brian Rosenworcel?

"The drums are amazing," said Maggie Reed (freshman-architecture), who watched in awe as she danced on the floor with her friends during most of the concert. "His hands are like rapid fire."

Indeed, Rosenworcel pounded his head with the same full-throttle force he beat the drums and cymbals with during most of the 90-minute concert. His performance is perhaps even more of a signature of Guster than the soulful harmony of its singers.

The mix of percussion and vocals gives Guster its unique sound and the crowd enjoyed all that the band had to offer.

"Fa Fa," the hit which MTV has been airing the video for, got a big response from the crowd and showcased the best of the band with spotlights on each of the members. Other crowd favorites included "All the Way Up to Heaven," where disco ball lighting effects gave onlookers the sense they were being transported to some higher destination.

"Airport Song" was also popular, with fans pelting the stage with bouncy balls at the end, and "Demons" showed the more spiritual side of Guster.

Mike Glumac (junior-public relations) sang along word-for-word with "Barrel of a Gun" and said he'd heard of Guster from a friend only about four weeks ago. He downloaded all of the group's songs from Napster and had most of them memorized.

"I think they have a good word-of-mouth following," Glumac said.

Meghan McGrath (sophomore-business logistics) said that's how she first heard of the band.

"My friend Cindy introduced me to Guster," she said. "They're a great live act."

And that they were.