Irish Virus in DC

I have been in Washington DC metropolitan area now for several days and have visited no less than four faux Irish pubs. Let me be clear that I did not seek out these establishments. It's just that they are everywhere. A local informed me that they are a "virus" and there is no end in sight. Funny, I never heard anyone call Starbucks a virus. Man, I hope we catch the Irish Virus in my city.