The comedy show is packed and the crowd — mostly beer-fueled young people — is roaring in laughter.
It's Wednesday at 9 p.m., and that means it's Stand Up Comedy Night at Memphis on Main, 55 E. Main St., C.
Jesse and Justin Tuttle, identical twins with shaved heads, athletic physiques and lots of teeth, host the free 90-minute shows at the bar.
On a recent Wednesday, just days before Christmas, Memphis on Main was full to capacity for a good dose of laughs.
Jesse Tuttle, who once did pro wrestling tours with his brother, said comedy is a natural outlet for him.
"Pro wrestling is not so different from this," he said, except for the spandex.
The Tuttles are seasoned performers — check out Justin's videos (some R-rated) at http://www.rooftopcomedy.com/comics/TuttleComedy  — but they share the stage with some newer performers who have anywhere from three months' to three years' experience, Jesse Tuttle explains.
Many of the more experienced ones come from the Jukebox Comedy Club in Peoria.
The late December show featured 11 comics, all men — and mostly very young men.
The jokes ranged from naughty to raunchy.
"We have asked and tried to enforce a light 'R' material with swearing to an extent being OK, but for some people it's hard to do, and it makes it more awkward to pull their mike, so we just ask for them to lighten it up when it's possible," Jesse Tuttle said after the show.
He admitted that some of the language went beyond R.
Crowd members showed their appreciation loudly. The reactions didn't seem to differ much from men to women.
"It didn't offend me at all," said 24-year-old Ariel Johnson of Mahomet. "I'm a regular, and you get used to it.
"You have to expect there are going to be some outrageous people at a comedy show. I didn't feel like as a woman I should be offended."
But the attractive women at the table nearest the stage got more attention than they probably wanted, with one called up on stage to hear a barrage of curse words while she stood there mutely.
No one from that table was willing to talk to a reporter after the show.
"It was a tough night," Jesse Tuttle admitted, adding it also was not a typical night.
Topics included child molesting, date rape, variations on sex, difficulties finding women and — in two of the cleanest acts — house painting and ice cream cakes.
John McCombs of Champaign, a recent University of Illinois graduate, told about the snare of lies into which he was forced when he wanted to buy an ice cream cake solely for himself.
The shaggy dog story comes from a true place: McCombs was watching TV, heard a reference to ice cream cakes and had to have a whole one for himself.
"I hit a new low in my life today," he began the story.
To ease the embarrassment, he said, he told the Dairy Queen employee to write "Happy Birthday, Tim" on it.
Then he ate it with his fingers.
A creative writing graduate, McCombs also writes comedy. He also has performed at the Clark Bar and at the Illini Union.
Even as a stand-up comedian, he says, he was surprised by how blue the Wednesday show turned out.
"It's rarely if ever that anybody talks like that," he said.
Another (largely) clean act came from Jeff Govednik of Peoria. You can check out one of his videos at http://www.youtube.com/watch?v=u5HuLJkN-G8 .
Govednik brought his acoustic guitar onstage and sang his "Mayan Christmas" song.
Think the end of the world and Jolly St. Nick don't mix?
For Govednik, the end of the Mayan calendar meant he could go cheap on the presents.
Ancient Mayans celebrated Christmas with turkey and ham just like us, he sang, with the additional human sacrifice.
Later, he performed a parody of a Tool song, which the crowd took as a dated reference.
In the song, Santa takes on Christmas in a very threatening set of minor chords.
The crowd lapped it up, even without the swear words.
If you go
What: Stand Up Comedy Night, featuring mostly R-rated comedy
When: 9 p.m. every Wednesday
Where: Memphis on Main, 55 E. Main St., C
More information: http://www.cucomedy.com ; memphisonmain.com/