I am not familiar enough with all the roles within Boy Scouts but would like to second Mike Long's comments. My son's troop also closes the evening in a circle, holding hands (right over left), and say the Scout's benediction. No one has complained about this but since it's always been done, it is not thought of as "girl scoutish". Haven't your boys seen college and professional football players grasping hands in the huddle or on the sidelines? To me, it is not un-masculine, simply asexual.
By the way, my daughter's Girl Scout Troop uses the same circle, but with a different benediction. Again, the circle shows a bonding within the troop.