For G2 Rex at least, they like sushi and BW3’s (Buffalo Wild Wings).
I’ve found four today and I’ve got these two outside my zone.
I just can’t go get them yet as Im eating. Both are at a sushi joint. Hopefully they stay there for another ten minutes or so. I gotta get my wing fix.
As a side note, I know that they’re more likely to spawn around restaurants, but I hardly see them. This is rare for me.