The history of Montréal’s night-time regulation reveals how managing nightlife expanded police power and budgets — and how burdensome effects of these changes fell disproportionately on sex workers, the queer community and hospitality industry workers.

For much of the first half of the 20th century, Montréal built a reputation as a North American nightlife capital. Tourists sought out cabarets, jazz clubs and after-hours bars, and moved through the red-light district where sex, gambling and liquor were openly available.

This permissiveness relied on a well-understood but illicit arrangement: police officers, politicians, madams, taxi drivers, performing artists and business owners all participated in a protected nighttime economy.

By the mid-1950s, however, this tolerance became the starting point for one of the largest expansions of police authority in Canadian urban history.

As I examine in my book Montreal After Dark: Nighttime Regulation and the Pursuit of a Global City, Montréal’s political leadership came to see nightlife control not as a marginal issue but as a central measure of civic order and modernity. And that shift transformed the police force.

In the 1940s, the Montréal Police Department was already stretched thin. Officers enforced wartime blackouts, guarded industrial sites and cracked down on sexually transmitted infections among soldiers and civilians.

The Morality Squad (“Escouade de la moralité”) — enlarged during wartime fears over delinquency — patrolled theatres, bars, parks and known queer or youth meeting places.

Young women were frequently arrested for “immoral” behaviour, while queer men faced entrapment and harassment. In this, Montréal’s squad resembled its North American counterparts, variously labelled vice squads — or, in Toronto’s case, the Morality Department, disbanded in the 1930s.

Pacifique “Pax” Plante, a city prosecutor, took over the Morality Squad at this time.

He insisted that officers apply........

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