protected void VenueLogin()
 {
     ServiceReference.LoginServiceClient lsc = new ServiceReference.LoginServiceClient();
     int key = lsc.VenueLogin(PasswordTextBox.Text, UserNameTextBox.Text);
     if (key != -1)
     {
         ErrorLabel.Text = "Welcome";
         Session["UserKey"] = key;
     }
     else
     {
         ErrorLabel.Text = "Login Failed";
     }
 }