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Put the flowers out first and then go to the podium and wait until the teenage boys appear. By that time you will have enough groups to fill all the tables.
Put the blue grown up girls at the table for 2 nearest the baseball ground and the one diagonally to its left which already has a blue chair.
Put the boys on the other table for 2 and the teenage girls on the table for 6, the table to the left of the boys and the one to the left of the table for 6. Then put the celebrities on the table that's left, between the two groups of blue girls.
Take the orders and serve them, then go back to the podium. Make sure you keep the ones in line happy, even if it means missing giving out peanuts.
Do the checks, then back to the podium, clear and put out flowers and back to the podium.
On the second round, put the boys at the table for 6 with teenagers at the table for 2 and the 4 to the boys' left. Put the family next to the teenagers and the 2 blue grown up girls in the same seats as before and the blue and green ones where the stars were.
On the last round, get the best colour bonuses you can which should be by using all the tables except the two 2s furthest away from the podium. Keep the stars happy.
If you manage to keep up the chaining you should manage an expert score. Best of luck!