Customers accounts can be created in 2 ways:
1) After Making a Booking
After a new Customer makes a booking on your site, they'll be asked if they want to Confirm their Account.
Once they confirm their account, they'll be able to sign in to your site and see all of their Bookings etc.
2) The Signup page:
Customers can create an account by visiting the signup page.
http://my-company.launch27.com/signup
You can find links to the Signup page on:
the Signin page
The footer of email notifications that get sent to Customers