One and two column themes on the same site?

I'd like to use Drupal for a very simple site. Most pages would be one column, with links to other pages just under the headline/header like in: http://drupal.org/project/blue_zinfandel .

Some pages would be two columns with modules like events, etc.

Is there a way to switch a theme seamlessly between one and two-columns?

Thanks.

Burton