I think guai wei ji (怪味鸡) and kou shui ji (口水鸡) are actually two different dishes, though a restaurant is likely to serve one or the other, but not both.
You and I seem to be the only two people in the Bay Area who remember O Mei in Berkeley/Albany. There is an O’Mei in Santa Cruz, but when I called them no one there seemed to know if there was any connection.
OT, but do you also remember the Pot Luck on San Pablo in Berkeley? I think of it as one of the real roots of California Cuisine.
