San Francisco? Unlikely.Boston,NYC,Philly and maybe Chicago.
Don’t know the numbers but back in the 80’s there were more then a few bars in SF that were the “known” Irish illegals hangouts, and they were packed all the time.
The cops in SF were half Irish then and could have cared less. The old INS would occasionally stage a raid but it was half hearted.
Nowadays there’s certainly far more Chinese and Mexican illegals in SF but it doesn’t mean the Irish left; they just have less to worry about.