Just reserve the table, class will meet on Friday during happy hour..
Then of course there are the faculty who live miles away. Not a few miles, mind you, but many. Such as the Windy City to the north, 'bout 130 miles. Or even the fair state of Wisconsin, several hundred miles of tundra to the north. These faculty come in for a few days, maybe staying at a Microtel or crashing in an apartment or a friend's house, but are not around otherwise.
How many of you have such stories of "roads" scholars?