What began as an electronic-dance-music show next door turned into a free-for-all on the gaming floor of Great Canadian Casino Resort Toronto—and now the province has sent the bill. Ontario’s Alcohol and Gaming Commission slapped the venue with a $350,000 penalty after management okayed the artist’s surprise after-party last September, letting 400 revelers swarm active tables and slot rows without a risk plan. Witnesses say at least one fan climbed atop a machine while security struggled to cope.

Police, paramedics and extra officers rushed in to deal with assaults, overdoses and public indecency. The AGCO’s report cites “multiple violations,” from lax crowd control to failing to alert regulators in time. It’s the casino’s third hit this spring: previous fines covered underage gambling and a card-cheating scandal involving dealers. Operators now have 15 days to appeal—but critics argue the pattern shows a need for tougher oversight.

Investors barely flinched, yet gamblers might—especially high-rollers wary of turning baccarat into a nightclub. The casino says it’s reviewing protocols and beefing up staff training, while AGCO warns that future lapses could lead to harsher sanctions or licence conditions. For now, management’s pricey lesson is clear: what happens on the dance floor shouldn’t spill onto the blackjack felt.