Wrapping views in listings?

I want to display a listing of users with checkboxes next to them. Ideally I could make a "wrapper" view that's used instead of user/default and that view would render the checkbox and pass $vars['entity'] on to the user/default view.

I know I could extend/override the user/default view, but it seems overkill since this very infrequently needed.

What's the easy way to do this?