Mombasa and Kilifi counties to pick their representatives this week.
GSU officers guarding the facility had to shoot in the air and lob teargas to disperse the protestors.
Coast region finals will be played in Tana River.
If their case to ban the stimulant is rejected, Coast leaders said they will launch a campaign against muguka in the six counties.
The governors said they got an invitation from the president on Friday but they needed time to carry out wide consultation and reach a consensus before meeting President Ruto.
Harambee Stars captain Michael Olunga is optimistic ahead of the match.
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