I did shrooms a few dozen times throughout my college years. Most of the time it was in a group environment just for fun. Sometimes we would try things like the artists you mentioned, but as we were all bio/engineer types it was never serious.

That said, I did perform a handful of solitary experiments where I would lock myself in my room with a programming assignment working non-stop for some 5-7 hours. The output was remarkable. But the drug was rough on my system and would take me days to recover.. so no more than once a month. Eventually stopped doing it altogether after a bad experience.