From the main page, if there are any open scrimmages at the time, you will see a list of scrimmages that looks similar to the picture below. It shows the information about the upcoming scrimmage(s) (date, time, location, cost, etc.).
Click on the Details icon for the scrimmage that you want to sign up for. You will be presented with a new page that lists the details of the scrimmage , who is currently signed up, and an area for you to enter your sign up information:
Enter your full name and the email address you want the confirmation email to be sent to. Optionally enter your cell phone number and select your mobile carrier to receive a text message (in addition to the current email) if you get moved off the Reserve list.
Very shortly after clicking on the Submit button, you'll be directed to a page that confirms your spot in the scrimmage.
and shortly thereafter you should see an email in your inbox like this:
Please note that the confirmation email you receive when you sign up also contains a link to drop your spot for the scrimmage. I've tried to make the system as self-serve as possible, so when you drop your spot, the system automatically sends an email to the person at the top of the Reserve list.