For locals who can't decide between live originals or familiar covers, Los Troublemakers incorporates both.

The band will play a mixture of covers and original songs when it hits the stage at 7:30 p.m. on the Lemont Village Green.

John Costello, bass guitarist for the band, said both kinds of songs in the band's repertoire are of an "American rock style," with a lot of emphasis and influence on older Grateful Dead songs.

During the group's set, the ratio between covers and originals is about 50-50, he added.

"I think with the originals we really came in and started learning them together and developing them together," Costello said.

"We also realize there is a need to keep the audience involved in something they know."

Susan Smith, who handles publicity for the concert series, said that the band's performance appeals to a wide audience.

"They're great, especially for older people because they play the Beatles and other things people recognize," she said.

The band's original songs center on Pennsylvania history and bring up such events as the Johnstown flood in 1889, Costello said.

The band has at least 30 originals that they play interchangeably, and Costello said there are some covers that they used to play regularly but that the group has now dropped completely.

For the members of the band, Costello said music is something they mostly do for fun.

He added the group still tries to practice once a week and catch gigs when they can.

"There are kids and wives and other things involved for most people in the band," Costello said.

"We're definitely not going to be touring the East Coast anytime soon."

The band has done some unofficial recording, but Costello said the only reason they'd try to produce CDs would be for something to distribute to friends and relatives.

This will be the band's third year performing at the Lemont Concert Series, which Costello called a "fun little outdoor event."

Smith said people really enjoy coming to the venue.

"Families like to come down and bring picnics," she said. "It's all just for fun."

Costello said the band's music has the potential to appeal to students, and he wouldn't consider it a family band.

"It's pretty laid back stuff," he said. "But it's not so laid back that it's like some guy strumming his guitar on open mic night."

Costello said it was kind of a mistake that the gig happened to fall on Arts Fest weekend, but he thinks the size of the crowd could possibly be "hit or miss."

"Since we don't play a lot, people usually try to see us when we do," he said.

"We'll definitely be competing with the stage downtown, but maybe we can try for something like that next year."