The manufacturer will be throwing "pop-up events" in at least 14 cities across North America and Europe for the public to experience the upcoming OnePlus 6 firsthand. Prizes, food, and special guests have been announced to encourage users to come. The events are free with no RSVP necessary.
https://www.notebookcheck.net/OnePlus-6-launching-on-May-21-for-early-adopters-around-the-world.301894.0.html