For the same reason that others in the group were wearing rubber gloves and carrying toilet brushes.  Unless that has some hidden message I think it's safe to say they just decided to come to the game as a work group.  Also, getting front row at a game like this is almost impossible with their tent system and is basically the luck of the draw.  

Here's a picture of the whole group:  https://twitter.com/ZagKennelClub/status/1218722272074059777/photo/1