Have an Foursquare and Facebook ID??, if yes...you should try connecting both Foursquare and Facebook.
Step 1
Go to Fourquare then stick to Setting. You can see in the menu "Linked Accounts". There are two suggestion for linking the Foursquare, with your Twitter or Facebook. In this case, we're linked the Facebook.
Step 2
See the picture of Facebook Logo, then click link Link to your Facebook Account

Step 3
Go on click the button Login with Facebook

Step 4
You'll see the pops-up for allowing the Foursquare into Facebook

Click Allow and there you go the Foursquare have linked into your Facebook.
Read more...
Step 1
Go to Fourquare then stick to Setting. You can see in the menu "Linked Accounts". There are two suggestion for linking the Foursquare, with your Twitter or Facebook. In this case, we're linked the Facebook.
Step 2
See the picture of Facebook Logo, then click link Link to your Facebook Account

Step 3
Go on click the button Login with Facebook

Step 4
You'll see the pops-up for allowing the Foursquare into Facebook

Click Allow and there you go the Foursquare have linked into your Facebook.