I can't find a way to delete my account to zook city

Zook or Zoosk ?
Zoosk is an online dating community that synchronizes to social networks like Facebook.
Users can browse profiles of like-minded singles, set up dates and make new friends.

If you want to get rid of Zoosk, you will need to remove the application from your Facebook profile and delete your main Zoosk account.

Once completed, you should be free of Zoosk unless you elect to reactivate your account.
Log into the Zoosk website. (See Below.)
http://www.zoosk.com/help.php

Click "Settings" on the main menu bar.

Select "Account" and scroll down to the "Deactivate Account" link.

Click "Deactivate Account" and confirm cancellation when you are prompted. Your profile will be removed. Facebook Removal

Log into your Facebook account. (See Below.) http://www.facebook.com/

Click "Applications."

Select "Edit" and click "Show Authorized."

Locate Zoosk on the list and hit the "X" button to remove it from your authorized applications.