As part of the dungeon overhaul, there would be two hot spring rooms that can be encountered randomly as you traverse through the dungeon. 

One of which is for the MC to bathe with their companions, if you've slept with them there is a special CG for that.

The other one has Chad bathing with his companions instead, you can choose to cockblock and lower a heroine's affection towards him. If he had already slept with the heroine though...You'll just have to see it for yourself...