Make variant selection default to NO selection until customer makes it

[EventImageCo]

Hi There, 

I am selling a product that is actually an appointment time. My variants specify whether the appt is for a group of 1, 2, 3, 4, 5 etc persons. 

Since it defaults to selecting 1 person, the top variant of course, I had a hunch that it was just getting glossed over and people were NOT making a selection.

So I  added a variant called -- PLEASE SELECT -- and sure enough, I have about 25 orders from the past hour alone that have purchased a reservation for a party size of "--please select--"

HELP! Is there any workaround I'm not thinking of that could make the default nothing so that customers HAVE to select something?!