In route.php
Route::post('Home/addGuest', array('uses' => 'HomeController@addGuest'));
Should be
Route::post('Home/addGuest', array('as' => 'addguest', 'uses' => 'HomeController@addGuest'));
The "as" is the naming of the route, that you are refering to in the form. Be sure to update the Forms route to just "addguest" as well.