Director Judd Apatow took to Twitter on Boxing Day to criticize venues in Kitchener and London, Ont. for not cancelling Bill Cosby shows despite sexual assault accusations against the actor.

Cosby is visiting several Canadian and U.S. cities as part of a concert tour. Many of his American shows were cancelled in November when numerous sexual assault allegations surfaced.

At least 26 women have publicly accused Cosby of drugging, coercing and sexually assaulting them, dating back to 1965. He has never been criminally charged in connection with the accusations.

Despite the allegations, the 77-year-old is scheduled to perform in Kitchener on Jan. 7 and in London the next day. He's also scheduled to appear in Hamilton on Jan. 9.

Apatow, known for producing comedies like "The 40-Year-Old Virgin," "Knocked Up" and "Anchorman," criticized the venues' decision on Twitter on Friday.

"Is Cosby only popular in Ontario Canada at this point? Do people still find him delightful after 30 accusers?" he wrote.

He tagged the venues hosting the shows, Kitchener's Centre in the Square and London's Budweiser Gardens, asking if they planned to "let Bill Cosby perform."

By 9 a.m. on Monday, the tweets had a combined 206 retweets and 300 favourites.

Representatives for the venues have told media they have no plans to cancel the dates, as they are contractually obligated to pay Cosby for the shows.

He also tweeted a link to a page on Centre Square's website explaining why the centre isn't cancelling its show.

"This show was contracted over a year ago with tickets on sale for a number of months. While we may personally share concerns raised by the community, if The Centre forces a cancellation of this rental show it isn’t simply a situation of giving back the rent," the website says.

Apatow wrote: "I get it. But he shouldn't perform."

A London, Ont. group shares a similar sentiment, and plan to protest both inside and outside the venue on Jan. 8.

Megan Walker, the executive director of the London Abused Women's Centre, told CTV News Channel that the group of protesters hasreceived support from across the city.

"People are really outraged that there's been no action taken to date to cancel this performance," she said Monday morning.

Walker said some of the protesters are London residents who bought tickets before hearing of the allegations. When they heard, they tried to cancel but were unable to get a refund, she said. Instead of skipping the show, she said they'll be heckling and "creating all sorts of problems on the inside."

When asked about Cosby being innocent until proven guilty, both Walker and Apatow said the case was less about courts of law and more about the court of public opinion.

On Twitter, Apatow wrote:

Walker pointed out that few sexual assaults are actually reported. According to the Canadian Women's Foundation, only 22 per cent of incidents are actually reported to police.

"When we see almost 30 women come forward, we know that this is a very serious issue."