You can have multiple venues in your account. To create a new venue, simply click on the name of your restaurant in the control panel and select "Create New Venue" from the drop down list.
Then you can give the new venue a name and select the location and it's automatically created with new credentials.
You can switch between your venues anytime by clicking the restaurant's name and selecting the venue you want to work on.
Please keep in mind that creating a new venue is only available with subscriptions, so you cannot create a new venue during the trial.
The new venue under the same account doesn't get a free trial.