Be aware that The Birchmere ONLY uses Ticketmaster so if you end up on any other website you may be paying more than list price, tickets can be bought online at Ticketmaster or in person at the box office any night there is a show, the box office is open show nights between 5 and 9pm. If you purchase from the box office there is a service charge but it is less than Ticketmaster's.
If it's sold out. You can sometimes still buy tickets from the Ticketmaster site. I did so for last week. But had to pay more then the face value.
You can purchase tickets online and pick them up from the box office or have the tickets emailed to you.
Yes you can get them online
Multiple options you can buy them online or you can buy them certain days of the week when the Box office is open and I don't believe you pay a service charge when you do that. All the shows are general admission the earlier you get there you'll receive a number and you be led in in that order.
Thanks! Your answer is awaiting moderation.