Conversation so far:
What year did Terence Mckenna begin doing public speaking?
In the early 1980s, Terence McKenna began to speak publicly
What did Terence Mckenna mainly speak about publicly?
Terence Mckenna spoke on the topic of psychedelic drugs, becoming one of the pioneers of the psychedelic movemen

Question: Where did he mostly give his speeches?
Self-contained rewrite: Where did Terence Mckenna mostly give his speeches?