Victoria's opposition is facing questions about cultural issues within the party after scandals emerged on the same day about two state Liberal MPs.
Shadow treasurer David Davis was told to leave an event for being too intoxicated and Liberal MP Wendy Lovell has been accused of "postcode snobbery" for her comments about social housing.
Ms Lovell told the upper house during a debate on the Greens' homelessness bill on Wednesday there was no point placing social housing in wealthy suburbs.
"There is no point putting a very low income, probably welfare-dependent family in the best street in Brighton where the children cannot mix with others or go to the school with other children or where they do not have the same ability to have the latest in sneakers and iPhones etc," she said.
"We have got to make sure that people can actually fit into a neighbourhood, that they have a good life and that people are not stigmatising them because of their circumstances."
Opposition Leader Matthew Guy said Ms Lovell's comments were "exceptionally clumsy" but that she means well.
"This is an appalling example of the Liberal Party's postcode snobbery," Housing Minister Richard Wynne said in a statement.
"Matthew Guy should step in and apologise, not just on behalf of the Liberal Party, he should apologise to all those who have lived in public housing."
Greens leader Samantha Ratnam, whose homelessness bill Ms Lovell was debating at the time, said the comments were offensive and perpetuated existing stereotypes about people who live in social and public housing.
"There were members of parliament who spoke so passionately and eloquently yesterday about growing up in public housing," she told reporters.
"Unfortunately the Liberals have form when it comes to these kinds of myths and stereotypes."
Meanwhile, Mr Davis apologised on Thursday after reports emerged he was thrown out of a gala event on Saturday.
"It's clear I did the wrong thing on Saturday night, and I've apologised for that. I'm quite remorseful," he told reporters.
"I did drink too much and thereby that's my mistake."
Deputy Premier James Merlino said Mr Davis had a pattern of similar behaviour and called for Mr Guy to "clean his own house".
Mr Guy, who also attended the event, only found out about the incident on Wednesday.
"He wouldn't be the first politician to commit this sin and I'm sure he's not the last one. He's apologised for it, that's the right thing to do. I've expressed my disappointment to him about that," he said.
Last year Liberal member for Kew Tim Smith drunkenly crashed his car into a Hawthorn home, narrowly avoiding a child's bedroom.
He returned a breath test reading of 0.131 - almost three times the legal blood alcohol limit - and subsequently lost his shadow attorney-general role. He will not recontest in November's election.
