Depending on the context or type of stage show, it could be a number of words such as:
theatrical, Play, Performance, Review, Exhibition....and many more
Theater venue or just venue
miming
a dance recital
The stage of a fashion show is called a runway.
There are several phrases an author might use to indicate this. Some examples:(to audience)sotto voceunderaside
There are many uses of the word stage. A theatrical stage is sometimes called a deck. Another word for stage is platform. A scaffold is sometimes called a stage. Stage is used medically to mean the extent of an illness. as in 'stage 4' cancer. It can be a resting place on a journey or the height of a river, as in 'flood stage.'
Exeunt
Theater venue or just venue
miming
period, date, age, stage
present
show
show
to show
A stage of development might also be called a phase of development.
show off means flashy
a dance recital