On a day when President Bush sent a video message and Mayor Bloomberg opened his Upper East Side townhouse for a star-studded dinner, the International Olympic Committee’s evaluation commission also spent some time with community groups that oppose aspects of the city’s bid to host the Olympics in 2012.

The groups, Develop Don’t Destroy Brooklyn and the Queens Olympic Committee, were each given 15 minutes in the morning to present their cases to four members of the 13-member commission.

As the commission members, according to people who were there, scrupulously took notes, two representatives from the Brooklyn contingent presented their opposition to a basketball arena to be built by the New Jersey Nets owner, the real estate developer Bruce Ratner. It would be the site for Olympic gymnastics during the 2012 games.

The Queens group presented an alternative to the city’s plan to build a stadium for the Jets, which would double as an Olympic venue, over the Metropolitan Transportation Authority’s rail yards on the West Side. The Queens critics suggested instead that the Olympic stadium be at Shea Stadium.

“I told the commission that the Olympics had been co-opted to make real estate deals and the bid was not making enough use of existing facilities,” one person who was there and wished to remain anonymous said. “As soon as I said that, the IOC members dropped their eye contact and I could sense a level of discomfort.”

“They were taking extensive notes and seemed very engaged,” the founder of the Queens Olympic Committee, David Oats, said. “Everyone was very cordial.”

The politeness extended to the executive director of NYC2012, Jay Kriegel, who attended the presentations and took notes, but participants said he made no comments.

“The groups expressed their views, and both groups also expressed their votes for the Games,” Mr. Kriegel said later at a press conference.

During the meeting with the commission members, Mr. Oats said, he told them that NYC2012 had misled the International Olympic Committee in say ing New York had no backup plan for an Olympic stadium if the West Side stadium is not built. “They do have a backup plan, in Queens, which they have submitted to the U.S. Olympic Committee,” he said.

“I asked the commission,’ If they lied to us, how do you know they won’t lie to you?’ and that was when Jay Kriegel looked concerned,” Mr. Oats said.

The commission did not ask Develop Don’t Destroy any questions after its presentation, and asked Mr. Oats only a single question, regarding where some venues were in relation to others in Queens, people who were there said.

A third group, the Clinton Special District, which opposes the Olympics and a Jets stadium on the West Side, had also requested a meeting with the commission.

The group was invited to make a presentation at the meeting, which took place at 8 a.m. at the Plaza, but balked when it was told only one representative could attend. That number was later changed to two representatives.

The group, headed up by a West Side resident, John Fisher, also did not want to make presentations with groups that support the Olympic bid, as Develop Don’t Destroy and the Queens Olympic Committee say they do.

After demanding of the NYC2012 and the International Olympic Committee for several months the opportunity to meet with the commission, the groups were not notified until late Monday of yesterday’s meeting, leaders said.

Later yesterday, the evaluation commission spent time with Mr. Bloomberg, Governor Pataki, and other officials discussing the budget for the New York bid and security issues. A presidential representative, Roland Betts, who heads Chelsea Piers, also visited the commission and presented a video from Mr. Bush, who is traveling in Europe.

At day’s end, on the commission’s only non-working evening during its four-day visit, NYC2012 threw a bash at Jazz at Lincoln Center. Wynton Marsalis serenaded the visitors on trumpet, a modern dancer performed to a strobe light, and the comedian Whoopi Goldberg, the actress Meryl Streep, and the interviewer Barbara Walters spoke.

That event was followed by a dinner party at the mayor’s residence. Aside from the commission members, guests included the gymnastics coach Bela Karolyi, the former Secretary of State Henry Kissinger, the actor Matt Damon, stars from the earlier jazz concert event at Jazz at Lincoln Center, and many others.

They were said to have dined on roast turkey with cornbread stuffing and mixed vegetables. Dessert included warm chocolate cake, fruit sorbet, and Statue of Liberty cookies.

The seven tables were arranged according to the Olympic themes of community, excellence, hope, humanity, inspiration, peace, and sport. The mayor was seated next to the evaluation commission’s chairwoman, Nawal El Moutawakel of Morocco.

Others who attended included former ambassador Richard Holbrooke; the New York Jets’ owner, Robert “Woody” Johnson; the National Basketball Association commissioner, David Stern, and the artist Christo and his wife, Jeanne-Claude.

Dinner guests were entertained by singer/songwriter Paul Simon.

Today is the last day of the commission’s examination of New York City. Having been to Madrid and London, the evaluators will look at Paris and Moscow before filing a report with the International Olympic Committee, which is to choose the 2012 host city July 6.