Then return to this page, and it'll provide you with an authentication code, which you should send to Escape The Review from a company email address or Facebook/Twitter account. This is to ensure that listings can only be claimed by people authorised to manage them.
Why claim ownership?
Once you've claimed ownership of your venue's listing, you can update it to make sure the information about your games is accurate and up to date, and that your games are represented to their best advantage. You can also add listings for new games, and for any that don't already have listings.
Managing your own listings also provides you with additional info fields, so that you can make your games' listings more detailed and complete, and thereby more appealing to potential players.