I don’t recall every having problems with eating at Shanghai Bun in the summer–but then again, that was a couple of years ago. 
I do keep track of which restaurants don’t have heat in the winter, though (e.g., Wing Hing, Panda House, Big Harlie’s).
And I don’t recall ever getting a negative vibe from the staff at Shanghai Bun. Maybe I’m just oblivious.
It is certainly different in that Bao Dumplings has only dumplings (albeit many varieties) and noodles (and a couple of vegetable dishes), while SHanghai Bun has a full assortment of main courses, but only a few types of dumplings.
In any case, count Mark and me in if someone is organizing a HO down at Bao.
