Aura Nightclub sells tickets for special events and performances. These are usually on Saturdays.
Tickets are generally very affordable and less than $20. Expect to pay more for bigger name DJs.
Cover at the door usually ranges from free to $20 but likely will not be charged if you have a ticketed event. You will however, need a ticket to get into any event with tickets for sale.
Ticket holders get quicker, expedited admission as well.
You can buy tickets from the Discotech Webapp.