The best place for Theatre in South Mumbai is the NCPA complex at Nariman Point.

It has a main hall called the TATA Theatre and a smaller one called Experimental Hall.

These 2 halls, regularly hold shows, mostly on weekends though.

Tickets are available about 2-3 weeks in advance.

It is best to book in advance for weekend shows.

They have musical shows also.

The Experimetal usually holds new experimental theatre,some of which turn out to be excellant.

NCPA - National Centre Performing Arts

Other places for performing arts in Mumbai are :

Prithvi Theatre

Ravindra Natya Mandir

Sophia Auditorium

Best place to find out is check the local papers listings in the entertainment section or the time out magazine which has a good deal of information on the programs.