If you say it is best to have a singer, I went to A Liang two days ago, and a female singer was singing, which meets your requirements for "temperament"!

It's A Liang Bar in the alley opposite Ximengui's birthplace, next to Ruyi Garden.

Yinchuan seems to have singers and quiet places, so this is the only one. ...

As for the other Ai Yi castles, I guess you don't want to go at all. What a pity! - -

It's purely personal recommendation. Any similarity is purely coincidental.