Sauna

A sauna is a comfort-boosting object in The Sims 2: Bon Voyage and The Sims 4: Spa Day. It is also available after purchasing Sunlit Tides from The Sims 3 Store.

The Sims 2: Bon Voyage
The Sweat It Out Sauna is a sauna featured in The Sims 2: Bon Voyage. It can only be used by teenagers, adults, and elders. Sims will change into a towel wrapped around their waist or body before entering the sauna. While inside, they will sweat often, indicated by a wiping of their brow. Up to five Sims can use the same sauna at a time, with the lower bench filling up first. Once two Sims are seated on the lower bench, any additional Sims that use the sauna will climb up onto the upper bench. The lower bench always has a vacant spot, intended for use by Sims on the upper bench should they wish to enter or leave. Sims on the lower bench may frequently have to shuffle over in order to allow Sims behind them to exit. Sims will autonomously socialize in the sauna.

The sauna also serves as a WooHoo spot, and Sims can WooHoo or Try for Baby in a sauna. When done on a community lot, it will give the "Public WooHoo" memory.

If Open for Business is installed, Servos cannot use the sauna.

If Seasons is installed, using a sauna will increase a Sim's internal temperature.

Saunas must be surrounded by a wall in order to exist. When purchased in buy mode, the sauna's walls will come pre-built, and will follow the sauna when moved. The walls can be repainted and reused, but cannot be removed without also removing the sauna. If the player removes one of the wall sections needed for the sauna, the sauna will be sold for its current value.

Saunas come in two colors — light and medium — and have panelings of the same color to match in build mode (titled "Heatonism Light Panel" and "Heatonism Medium Panel", respectively).

The Sims 3 Store
The Steam-It-Up Sauna is available in The Sims 3 after purchasing the Sunlit Tides world through The Sims 3 Store for 2,450 SimPoints

Sims can use Hydrotherapy, Sit, Turn the Waterfall On/Off, Make Steamed Veggies, have a Revitalizing Mud Bath, and Enjoy a Refreshing Steam. This is also a WooHoo Location.

Hydrotherapy gives your sims the Recover Like a Sports Star (+20) Moodlet. It takes away soreness, fatigue moodets from workouts.

Revitalizing Mud Bath gives your sims the Inner Peace (+20) Moodlet. This also subtracts a day from your sims "Days Until Aging Up" (adding an extra day of life).

While Enjoying a Refreshing Steam, your sims will have a Refreshed (+20) Moodlet. This disappears when they are out of the sauna.

The Sims 4: Spa Day
The StoneZone Sauna and Artificial Fever Sauna are two saunas that were introduced in The Sims 4: Spa Day. They can be used by children and older. Much like The Sims 2, Sims will change into a towel wrapped around their waist or body before entering the sauna.

Sims can WooHoo or Try for a Baby in a sauna, and teens can Mess Around. Sims will get the Hot N' Steamy moodlet, which lasts for 4 hours and gives the Sim the Flirty emotion.

Sims can die if they use the sauna too frequently. If a Sim uses the sauna when they have the "Superfluous Steaming" moodlet, they will die.

Sims with level 5 mischief can play a prank by using the "sabotage with sulfur" interaction. The next sim to use the Sauna will get an hour long -1 Uncomfortable moodlet.

The Sauna also has upgrades available for sims with the Handiness skill. These include Self-cleaning (no need to clean) and Waterproof circultry (will not break).