I worked for a US defense contractor which had a contract with Indonesia to build facilities and train the locals to build our products. This was near 1990.
Several from my dept. went there for a 6 mo. stay. A couple of months in, our Company Pres. and some other Execs went there.
To greet them, the Indonesians had a formal dinner. Everyone was seated on the floor around a table. The hosts cut the top of the skull off of a monkey, whose head was poking up through a hole in the table. Everyone was expected to taste the “delicacy”.
It's both a delicacy and a practice that is strongly denied, even labeled "Urban Legend" [a fathead term that should always be followed by 'sic']. I first heard about it in a sociology lecture from the abrasive but brutally honest a-hole of a professor. In the second (?) Indiana Jones movie the practice is in a scene but cleaned up insofar as the fake monkey props were not simulated properly. In practice it is live monkey brain.