Your code looks correct, however, query_posts is used to modify the main query of the post/page you’re on. You’ll probably want to use get_posts instead. The rest remains the same:
$args = array(
'post_type' => 'post',
'cat' => 399,
'posts_per_page' => -1,
'meta_query' => array(
array(
'key' => 'organization_type',
'value' => 'socialbusiness',
)
)
);
?>
<?php
$social_businesses = get_posts( $args );
if ( $social_businesses ): ?>
<?php foreach ( $social_businesses as $sb ): ?>
<a href="<?php echo get_permalink( $sb->ID ); ?>"><?php echo get_the_title( $sb->ID ); ?></a><br>
<?php endforeach; ?>
<?php endif; ?>
