I believe there is a misconception here.
Doing a manual white balance, will not preserve the look of the lighting, it will try to neutralize the light and thus the rendition of color.
How white balance works
If you have a room with warm (incandescent) light, the light has a very yellow/orangish tone to it. Any object that is reflecting the light will absorb different wave-lenghts of light to various degrees. Thus we perceive its color.
If the light that hits the object is very yellow, the reflected light will share this trait.
To create a correction in white balance, you shine the existing light onto a neutral object (white or neutral grey) and tell the camera that this should be the new reference for neutral color. This way the camera is able to calculate the offset and compensate for it.
A formerly yellowish mood will now look neutral.
Note: This will not work completely if you have mixed light. This is the reason why you can change the color temp on many lights. You can then either match the temp to have the same look - or set them differently to set a special mood (e.g. a warm bedside lamp and a very blue light from a window to indicate night).
What of you want to preserve the mood?
Then override the white balance by setting the color temperature manually to whatever setting you like. On a mirrorless camera, this is quite easy, as you can see the preview. Also if you shoot raw, you can completely override the white balance in post production - and fine-tune the mood with that.
This enables you e.g. to make a mid day image to look like sunset - and use the color temperature as another means of telling a story.