In order to change the names on the tickets, you need to be registered and logged in to the platform. After purchasing the tickets as logged in, go to the Bookings page, select your order and edit one of the tickets by clicking the edit button. The final step would be to resend the updated tickets on your email address by using the second button on that page.

Soho House members can buy up to four tickets each (one for themselves, and three for guests)