At every establishment licensed pursuant to this chapter having a capacity of not
less than 200 persons, not less than one additional employee for each additional 100
persons who could be accommodated, whether actually present or not, shall be constantly
in attendance during the entire time that any entertainment is in progress, and shall
devote their entire time and attention to the keeping of order, the checking of the
admission of minors, and seeing to it that all provisions of this chapter are complied
with. The commission may require such additional employees or guards on an individual
basis as the commission deems in the public interest.