Toronto runs the cold side as an ice bath rather than a plunge pool. Ice water on site is the local pattern, and the stoves run electric.
Aufguss is on the schedule at some, and a bar attached is not unusual. These are city venues built for repeated rounds rather than a single long sit.
In Toronto, 4 of the curated saunas fit this cut. See the full Toronto guide for every venue, or keep scrolling for just the saunas with a cold plunge.
Every sauna with a cold plunge in Toronto

Alter — College West
$$Toronto, Canada
Alter is a neighbourhood hot-and-cold studio on College Street built around a Finnish sauna scented with essential oils and four-person ice baths. Sessions are either self-led or run as instructor-led classes, with a rest lounge to cool down between rounds. Low-key and community-minded rather than spa-formal.

Alter — Leslieville
$$Toronto, Canada
Alter's Leslieville studio brings the same hot-and-cold formula to Queen East. A Finnish sauna scented with essential oils, four-person ice baths, and a rest lounge to cool down between rounds. Sessions run self-led or as instructor-led classes, low-key and community-minded rather than spa-formal.

Othership — Adelaide
$$Toronto, Canada
Othership's downtown Toronto bathhouse runs sauna as a guided group ritual. A cavernous cedar room with sound and lighting, pairs of two-person cold plunges, and breathwork-led classes from high-energy to near-silent. You book a session type rather than dropping in, and there is an elixir bar for afterwards.

Othership — Yorkville
$$Toronto, Canada
Othership's Yorkville location is the brand's flagship. A 90-person performance sauna in Western Red Cedar, eight individual ice baths, and an amphitheatre-style tea lounge wrapped around a fireplace. Sessions are booked as guided classes or free-flow, ranging from loud and social to quiet and meditative.