WCF Newbie question

Question

Hi guys, please help with WCF.
I've seen a lot of tutorial that uses a client (web app, win app) to consume the methos of a WCF. However, in my case, the WCF that I am going to create will not have a client, which means, the WCF will be hosted as a windows service. Is it okay that a WCF will do everything like reading a data from a file and store it on the database?