Not US, but the seminars to fill in the hours in my country were closer to legal bribes and/or holidays in often exotic places. They usually were provided/funded by the medicine lobby.
Same in US only sometimes more banal. Signup sheet in front of the stacks of pizza at some research talk at the medical school. Back row entirely asleep. Talk had nothing to do with medical practice but the researcher holds an md phd. Might be talking about their work in yeast.