Charles Haberl kindly provided these details in response to my question about a Mandaean-owned restaurant in San Antonio:
The restaurant you’re looking for is (appropriately enough) called El Rio. It’s at 1361 S Main St #600, Boerne, TX 78006, United States.
It’s a half hour drive from the Convention Center, and so I don’t know whether I’ll be able to get there during AAR/SBL.
Jim Davila said he wanted an update, and so I hope he sees this!