Ok, I had a chat with the admin team, and while we really appreciate your enthusiasm, we feel that Whisper's birthday party might not be the best setting for a sales event.
That said, the Haqihana harnesses are already highly regarded by many in our group, so we think a separate event dedicated to trying them out would be a great idea! It could give members a proper chance to learn more and ask questions. We’d also hope you could offer a limited-time, members-only discount to event attendees.
If you could let us know a couple of weeks before you're next in Sydney, we can organise a special event.