Which project shall be WCF type?

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WCF

Hello

Which one of bellow projects shall be WCF type in my solution in service-oriented application?

ProjectName => Project Type => Description

Entities => WCF => Structure of my database tables
Contracts => WCF => Interface of all methods and functions
Data => Class Library => data access layer with DataSet/Entity framework
Services => WCF => methods and functions codes
Host => Win Application => implement sevices
Proxy => Class Library => connect client to service
Client => Win Application => user application


1. Is any better break down for WCF application
2. Can any web application connect to "Windows Type Host"?

What I have tried:

I found that any project contains "Contract", "Service" and "DataContract" shall be as WCF type.