Here is NO WAY to mix races and cultures... You don’t want ANY competition among them, no need for frustration and tensions.

If competition among participants is avoided, if there are no inferiority complexes, if all are about the same age, if there is no fight for women, if none is psychopath, if there is a democratic share of authority, if there is a good cooperation and discipline, if sanitary rules are kept, if all are healthy, if all…