It's a great way to meet up with nearby friends and also to learn about their favourite spots and the new places they discover.
For more information on how the service works and how to sign up, The Foursquare website has a great"How To" page here
One of its best features is that if you visit a place more than anyone else, then you automatically get elected "Mayor" of that venue (until someone else comes along and steals your coveted title).
It all sounds a bit silly until you see the list of places that are offering Mayor freebies.
And as you can see from the attached image we at Domino's Pizza are offering One Free Medium Pizza EVERY week to whoever is the current Mayor. (There is a sign in the shop explaining just how this works and what you have to do to qualify for your pie). You'll be able to read this when you check in for the first time!
You can order a delicious Domino's Pizza by phoning 0151 449 0449.
Or why not try ordering on our website where there is a great selection of offers and Meal Deals?
Or if you want to find out more about our shop or other local news you can follow us on Twitter ,we'd love to hear from you!
Or become a Fan on Facebook (we currently have over 1,000 so you'll be in good company)
When you get "elected" Mayor of Domino's, unfortunately there are no chains of office to wear, nor official functions to attend like our very own Mayor of Knowsley, Cllr Dave Smithson (pictured here with his wife Sarah), but you are guaranteed 1 FREE pizza every week!