Cancel the dinner. Chat with faculty around the water cooler after the seminar.
Plot twist: water cooler was used during dept holiday party, at which alcohol was served...
Flyout dinner
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Aumann has quite a lot to offer to balance the externalities he will create. Religious JMC is a black box wrt positives (unless already a known superstar) and a clear negative wrt externalities (+ also a way he discusses related things). Hence expected value of Aumann can be estimated to be positive, while with a religious JMC things might not necessarily develop in that direction
Precisely this. Accommodating certain preferences is not a thing that doesn't happen (it absolutely does!), but in this case the information transmitted by a nobody is that they will from the get-go will extremely difficult to accomodate in any traditional US department when it comes to the social side of the profession, i.e. departmental gatherings, dinners, well basically you name it and this person will not be able to attend. Not the greatest signal to put forward.