If these folks aren't on too many groups, they may be able to use the Calendar on the overview page without much confusion.
/calendar That will show events for all of the groups they are members of and will have the 'shortcut' name of the group shown first. You can hover over each one to see most of the description, or click on it to see the whole thing if it doesn't fit the page. You could try it out to see what you think.
Duane