hai

 the ASPNETDB you found under the app_data folder is used for the authentication and authorization purpose of the users in ur site

 you just dont do any thing in the aspnetdb it is automatically created when the website administration tool is used .

you just do in the club database only , you can run the file before or after hosting its not a problem , if you use aspnet_regsql .exe tool to copy the schema of the aspnetdb to the newly created database  there is no need to host both the db's one is enough and change the connection string in machine.config file to your applications web.config file then every thing will be  ok