Most of the bedrooms have a mezzanine level.

大多数卧室都有夹层。

So, if you have two balconies, which would be three total levels of seats, the middle or lowest balcony would be the " mezzanine level."

所以，如果你有两个阳台， 总共三层座位，中间或最低的阳台就是“夹层” 。