"We were heckled a couple times when we played with them before," On said, which he attributes to 311's "hardcore fan base."
"It's to be expected when opening for such a big band."
Mike Samilo (junior-accounting) said he's liked O.A.R.'s music since his friends introduced him to it.
"It gets away from all the normal stuff, not real popular. Not pop where everything sounds the same," he said. "I'm sure somebody I know is going."
One reason Samilo said he and other students might not attend the show is the cost of tickets.
However, O.A.R. has a history in this town and if hardcore O.A.R. fans are anywhere they are certainly here.
"Crazy Game of Poker" and "Hey Girl" are two of Gannon Hessmiller's (junior-crime, law and justice) favorite O.A.R. songs. He said O.A.R. has a fun sound.
"I like the entire genre," Hessmiller added.
O.A.R. draws the usual jam band crowd, David Wells, director of operations of Crowbar, 420 E. College Ave., said.
On said Crowbar is the largest place O.A.R. has played at Penn State. Crowbar has no hard feeling however, that the group's fan base has grown too large for the bar's stage; the venue is even helping promote tomorrow's concert.
"They're an outstanding band," Wells said.
Crowbar hosted a sold out O.A.R. show about two years ago and the band is following a similar growth pattern to other bands that have moved on to the Jordan Center, Wells said. Crowbar hosted Creed and drew an audience of 400 the first time, 500 the second time and sold them out the third time, he added.
"There wasn't a middle point between the Crowbar and the [Jordan Center]," On said.
In a space as large as the Jordan Center, On said he's looking forward to the opportunity to see how many people O.A.R. can draw.
As a Big Ten school, Penn State reminds On a lot of Ohio State University, where the O.A.R. band members matriculated.
Recently O.A.R.'s been playing at smaller colleges and On said he and the band are excited to party at Penn State as they have many times before.
"It's gonna be a fun show," On said.