ACF plugin – showing data?

Hi,

So I started using Advanced Custom Fields but I am not sure how to use it, I have been through their documentation and I have managed to get SOME data out but not all….

<?php while ( have_posts() ) : the_post(); ?>

				<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>

				<?php if ( ! $is_page_builder_used ) : ?>

					<h1 class="main_title">&nbsp;</h1>
					<?php

$posts = get_posts(array(
	'numberposts' => -1,
	'post_type' => 'pub',
	'meta_key' => 'pub_name'
));

if($posts)
{
	echo '<ul>';

	foreach($posts as $post)
	{
		echo '<li><a href="' . get_permalink($post->ID) . '">' . get_the_title($post->ID) . '</a> - '. the_post('town').'</li>';
	}

	echo '</ul>';
}

?>

My code here outputs the following:
another pub –
The Spotted Cow Inn –

this is correct but ‘town’ is not being output?!

Please help