Tables – need help fixing default text size

I’m having a problem with tables on my wordpress site. The text size in any html table is automatically huge.

For example – http://www.publicmediaservice.org/tours/toursbydates/

How do I fix this is the basic templates or css files?

I can’t even manipulate the size by including any font size codes in the html around the table. The closest I get is by surrounding it by

for the preformatted text.

Any ideas?