As many as you like! You can purchase tickets for yourself and/or your friends and/or family. When you are at the venue and are checking in for the event using digital tickets stored in your app, just swipe (right to left) through the individual tickets as you get them scanned. If you are using a printed version of your tickets, the tickets will be displayed as separate bar codes on your order.
NOTE: Depending on the venue's requirements, there might be limitation in place for how many tickets of a certain type you can purchase. Please contact the venue for more information.