The photos, originally obtained by the Post from a social networking site, show August Ritter drinking from the tap of a keg and hoisting the official state flag, which the Post identified as the one that usually flies outside the Governor's Mansion.
Other photos show revelers preparing to drink from a "shotski", a ski with shot glasses attached.
Gov. Ritter's spokesman, Evan Dreyer, says all those attending the parties in the photos were of legal age to consume alcohol. Dreyer says no one was hurt and no damage was done to the Governor's Mansion.
The online invitation for one party, billed as an annual "Mansion Masquerade," read in part, "We will only be able to do this for another 2 to 7 years (depending on the voters of Colorado) so we need to take advantage of that."
Dreyer pointed out that, unlike in some previous administrations, the Governor's Mansion is the actual residence of the First Family.
Dreyer acknowledged that eyebrows may be raised by the photos because the Governor's family will be held to a different standard and will continually be in the spotlight.
"Something they accept, deal with, and sometimes struggle with," said Dreyer.
As for the online invitation's suggestion that state troopers will be doing crowd control, Dreyer said that was an attempt at humor.
"That's not their job," he said. "They didn't do that."
The mansion bashes were not without order. The invitation stated, "Mama Ritter has two rules for parties that I have at the Mansion."
"No throwing up," the invitation read. And "no sexy time."
(Copyright KUSA*TV. All rights reserved.)