The time listed on an event page is when the doors open for a particular event, and the show typically starts 30 minutes after that.
For specifics related to your event, check the address reveal email sent 36 hours before the show, as it will include the time that doors open and the time the show begins.
Please do your best to arrive within that time frame, as you may be asked to wait for a break between sets if you arrive after the show has started.