"I have a ton of work this week, so it's been kind of stressful," Courtney Poillon, Kappa Kappa Gamma sorority Greek Sing chair, said.
Some performers said they also felt pressed for time.
"It's hard to keep up [with schoolwork]," Vicky Barg, a new member of Kappa Delta sorority, said.
She added that her sorority sometimes has practice twice a day.
"It's so time consuming," said Kendall Thornburgh, also a new member of Kappa Delta.
For Thornburgh, (sophomore-musical theatre) singing and dancing are second nature; she is the lead in her organization's performance of State Fair.
For others, singing and dancing does not come as easily.
"We give [the boys] easier moves," Poillon said.
Some sorority members said motivating new fraternity members to perform was difficult.
"Some of the guys, I'm sure, aren't excited about singing and dancing," Kate Trotman, Greek Sing public relations and student relations chair, said.
Eventually, however, the new fraternity members will look back on Greek Sing as a "fun part of their new member process," she added.
Elise Hunter, a new member of Kappa Kappa Gamma sorority, said it was difficult to elicit interest from some of the participants from Kappa Delta Rho fraternity, 420 E. Prospect Ave., for the groups production of Bye Bye Birdie.
"It's a lot of work just to get them to be enthusiastic and motivated," Hunter said. "That's work in itself."
At first, the new members of Pi Kappa Phi fraternity, 409 E. Fairmount Ave., were not motivated, but that changed after they began practicing with members of Kappa Delta sorority, Sarah Maclaughlin, a new member of the sorority, said.
"We became friends with them, so now they feel like they want to help us," Maclaughlin said.
Adam Massaro, a new member of Kappa Delta Rho, said he felt more comfortable the more he practiced.
"At first it feels kind of feminine, but when you become more secure with your sexuality, you're fine," Massaro said. "It's all about being comfortable."
Although it may be difficult for new fraternity members to sing and dance, it is "really not that bad," Kevin O'Malley, Kappa Delta Rho Greek Sing chair, said.
"They're pledging a fraternity," he said. "Pretty much every other house that has a pledge class is doing it."
Pete Roman, also a new member of Kappa Delta Rho, said Greek Sing involves "way too much practice" and takes up too many hours each night.
Roman said some practices run from 6 p.m. to midnight, and performers are only excused for class-related activities.
Poillon said although some of the new members are tired from long practices, the amount of rehearsal time is necessary.
"They get breaks," she said. "We're not slave drivers."