It is an hour long event, so guest are welcome to join fashionably late, just not too late—it ends at 10:00pm ET (7:00pm PT). If you do miss it, thee will be a rebroadcast on Saturday, May 9, from 2:00-3:00pm ET (11:00am to 12:00pm PT). Though it's a rebroadcast, attendees can still jump in during the the show.
This will be a safe space, so to speak. As in, there will not be any weapons and the ability to build will not be available. However, there will be some activities available.
"Shows at the Main Stage are just some of the many attractions at Party Royale. In this new experimental and evolving space, there are many things to do and places to explore. For example: take on aerial obstacle courses at Skydive Rift, participate in boat races at Fishsticks’ Boat Race, and grab items at The Plaza such as the new Paint Launcher," Epic Games says.
To join the event, select the "Party Royale" playlist in Battle Royale once it begins.