It's been many years since I went into the city for St. Patty's but if things are anything like they used to be pretty much every Irish themed bar is lively from opening to close - packed to the gills would be a more apt description. If you want to sit and don't like waiting in line go early - before lunch starts. Also, don't expect anything beyond hastily poured beer in a plastic cup. No one is taking the time to pour a nice pint. That said, it can be a lot of fun if you're in the mood for that sort of thing.