http://wordpress.org/extend/plugins/events-made-easy/ If the template you are using has an embedded Google map and only an empty box is showing, the cause might be a conflict with Events Made Easy. This plugin still uses the Google Maps API 2 which is loaded in the head of every page instead of just the pages it is needed …
You can hide empty categories by setting a template enable shortcode option, show_empty_categories. Here’s an example: