The San Francisco Examiner reports that in a memo issued last week by City Hall Building Manager Rob Reiter, limits are being set on the number of attendees, alcohol use and noise levels at the parties.
The Examiner said the guidelines come after some supervisors, including Supervisor Ross Mirkarimi, held what are known as art parties in their offices.
Supervisor Chris Daly also tended bar in his office as a fundraiser.
The memo from Reiter reads in part, "these guidelines are intended to limit the financial and physical impact to City Hall events, the Sheriff's Department, and the City Hall Building Management staff," according to the newspaper.
Reiter and Mirkarimi did not respond to calls over the weekend from The Associated Press seeking comment about the restrictions.
Supervisor Daly responded in an e-mail, noting that the last party he held where he was tending bar, was a fundraiser for the Coalition on Homelessness last December.
"While I appreciate City Hall Building Management's efforts to better coordinate events in the building, I actually have witnessed a decrease and not increase in the number of events in Supervisor's offices," Daly said in his e-mail.
"I don't think the new regulations make sense, and they may actually violate the separation of powers provisions in the Charter," he added.