If a performance is sold out, you can try to purchase a standby ticket. With a standby ticket, you’ll be allowed into the auditorium right before the start of the performance and can choose a seat that is still available. If not seats are left, your ticket will be refunded.
You can also sign up for the waiting list from one hour before the performance starts. You must do this in person at the venue, not by phone, and joining the waiting list does not guarantee you a seat.
PLEASE NOTE: if you get a ticket through the waiting list, you can only pay in cash.
You can always try your luck on Ticketswap, maybe someone is selling their ticket(s) there!