Apparently they design miniature golf holes for Washington’s National Building Museum.
From the exhibit web site:
The Museum invited firms and individuals to sponsor, design, and construct a hole with a building-related theme inspired by an actual building, bridge, landscape, or monument—or a completely fanciful one.
The following organizations and individuals answered the call, and their ingenuity will be on display all summer. Many have teamed up with other building industry professionals to make their hole as dynamic as possible. To stir the team’s competitive juices, the Museum will present a Best in Show award determined by a jury of design experts, and players will vote for People’s Choice.
Pictures to come after my championship round later this summer.