In Montana, Michigan and other states, they have a single big breakfast each year. In Washington state, the meetings are not on government property. The law on such events seems settled. In 1983, in a case in which a Nebraska lawmaker challenged the hiring of a chaplain and daily prayer, the U.S. Supreme Court ruled that those customs don't violate the First Amendment's anti-establishment clause. A decade later, the Supreme Court ruled in a New York case that a school district could not deny a religious group the use of its facilities for after-hours meetings in which participation was voluntary.
Legislative prayer breakfasts, then, can be assumed constitutionally permissible, experts say.
I think there are many Americans who are uncomfortable that religion is being prominent within legislative bodies. In Kansas, as in other states, each House and Senate session begins with a prayer. Some legislators keep Bibles on their desks and read them daily. Some post devotional messages in their offices. Some also seek the fellowship offered by group prayer meetings.