After you have saved your event, you can publish it on the GBTW website.
Sign into the app, using the same account as you use to sign into the ClubSpark admin area. All the open days you have created will be listed.
Each open day displays a list of players who have previously booked. You can check these players in by selecting the attended circle next to each player, as well as adding additional players to the session who turn up on the day, using the 'add walkup' link in the top right corner.
All data captured is seamlessly synced with your ClubSpark account, taking all the admin out of your events.