I just did my first word press install this weekend and I ran into this same problem. To my excitement, I was able to fix it!
If you go to Plugins > Editor > and open the file:
the-events-calendar/admin-views/event-map.php
About the 10th line of code gets to this part:
function initialize() {
var myOptions = {
zoom: 14,
center: event_address,
mapTypeId: google.maps.MapTypeId.ROADMAP
the zoom # is what you want to play with. I think the default is 8. 4 is roughly showing the entire US, 14 gets you about 4 blocks in Washington, DC.