Events Calendar 3.4 // Add Category Slugs to body_class() when viewing Single Events

gistfile1.php

add_filter('body_class', 'event_category_body_classes');
 
function event_category_body_classes($classes) {
	if ( tribe_is_event() && is_single() ) {

		//Query event categories
		$event_categories = wp_get_post_terms( get_the_ID(), 'tribe_events_cat' );
		
		if( !empty( $event_categories ) ) {
			foreach( $event_categories as $single_category ) {
				$classes[] = 'tribe-events-cat-' . $single_category->slug;
			}		
		}
	}
	
	return $classes;
}