What do you get when you mix five Berklee-trained musicians and one memorable boozy night out with friends? A refreshing dose of Drunken Logic.

Vocalist Jake Cassman and bass guitarist Sam Sewall, two of the five-member band that plays weekly at Faneuil Hall, sat outside the landmark building before their Wednesday night performance.

Cassman chose a seat on a bench. Sewall sat on the cobblestones.

Because some of the band members are still in college, their schedules are limited by classes, so the band rarely ever gets to play at Faneuil as a whole.

“We came up with a formula – two leads and one rhythm,” said Cassman, explaining how the band is still able to perform without being present in its entirety.

Drunken Logic’s band members are either current Berklee students or recent grads, and include electric guitarist Austin Wells, acoustic and electric guitarist Ryan Jordan, and drummer Alex McGillivray. Wells, Cassman and Sewall met while playing frisbee, Ryan and Cassman had classes together, and McGillivray and Cassman were in the same a capella group.

The band collaborated on an album before it really solidified, said Cassman, which has led to a changing dynamic. At first the band was very business oriented, but now, said Cassman, “We are admitting that we like each other, and have to hang out.”

“I’ve started forcing a Sunday band breakfast and rehearsal,” added Sewall.

The band’s name was born on a night out with a friend, said Cassman. The two were drinking at a pub when she coined the phrase, which he thought would be suitable for a band name. He said the deeper meaning behind the name lies in its deliberate redundancy, and was intended to remind people to loosen up about questionable past decision-making processes.

“We’re thinking of making our own reggae cover band called Stoned Reasoning,” joked Sewall.

Faneuil Hall is a different performance experience for the band.

“It changes the dynamic quite a bit,” said Cassman. “We play more covers here than we do normally.”

“We have to build an audience, so we throw out a cover to get their ears hooked, then play an original,” added Sewall. “Hopefully we build up a crowd and get kids dancing and the family pays, and people think it’s cute.”

The band describes its sound as “indie folk rock,” and draws inspiration from “rock sound, pop sensibility and fun music,” said Cassman.

“But we’re very eclectic,” he added. “That’s one of the things we’re most proud of as a band.”

Catch Drunken Logic performing this weekend, October 12 through October 14, at the Street Performer Fall Festival. In the meantime, you can hear a preview of their music here:

Photo via drunken-logic.com