how do i insert a simple expandable column table in wordpress?

I would like it to show up on a page as content, not a post.  It's a schedule of meetings my organization has every year, i.e., host, date, venue, etc. across the top of the table

I would use a table. When it comes to displaying tabular data, tables are still the way to go. So you would need to create an HTML table of your schedule then create a page and insert the code on the "HTML" tab of your editor.

The easiest way would probably be to use this plugin:  
http://wordpress.org/extend/plugins/wp-table-reloaded/

If you don't want to use a plugin - you could do it manually:

Here is a great tutorial on tables:
http://www.w3schools.com/html/html_tables.asp

Or you could use this site - it generates table / css code and labels them with a easy-to-follow labelling system. If you use this method, you would need to add the css to your style.css in your theme folder, and paste the html on the "html" tab of your page editor:

http://www.spectrum-research.com/V2/generators/tableframe.asp