National Republican Senatorial Committee spokesman Brian Walsh said the organization will not say who attended Monday night’s health care roundtable and dinner at Washington, D.C., steakhouse, where U.S. Sen. Richard Burr was a featured speaker.

"We don’t release names of those who attend private events," Walsh said, adding that the NRSC will disclose its contributors as required under federal campaign law.

"This policy is no different than countless fund-raisers by President Obama," Walsh said.

Burr, who sits on the Senate health committee, was one of three GOP senators who spoke on behalf of the NRSC fund-raiser Monday night, Barb Barrett reports.

For checks of $2,000 per political action committee, up to 35 attendees were offered seats at a "Roundtable on Healthcare Issues" at Charlie Palmer’s steakhouse. A more exclusive group of 20 could stay for dinner at a cost of $5,000, according to the invitation posted by the Sunlight Foundation.

Also speaking were Republican U.S. Sens. Charles Grassley of Iowa, the top Republican on the Senate Finance Committee, and Mike Enzi of Wyoming, who sits on both committees.

Burr’s campaign consultant earlier said the Burr campaign had no details about who attended the NRSC event.

A blogger at Huffington Post tried to crash the event but was prevented access. He did, however, chat with a representative of the American Staffing Association and a hospital CEO from Texas.