As big baseball fans, be sure to visit Monument Park before the game. It opens when the gates open and closes 45 minutes before the game so get there early. Also, be sure to ride the subway home from the game for a lot of singing and fun.
Some famous diners and delis that are usually recommended are Empire Diner, Katz's Deli and Carnegie Deli. As far as other things to do, I love the Lower East Side Tenement Museum, Ellis Island, Circle Line cruises, the Cloisters, Am. History Museum, Coney Island, Brooklyn Heights Promenade, walking the Brooklyn Bridge at dusk, walking around Harlem, East Village and everywhere else. There is a ton more if you kind of tell me what you guys are interested in.
You can get an unlimited subway 7 day pass for $25, so I would suggest that.
As far as Irish Pubs, there are a ridiculous amount of them in NYC and everyone seems to have a different opinion about each. I don't really remember which ones I have been too which I would think would mean that I had a good time. Just stay away from any pubs or restaurants around Time Square. These two websites might help you out some
http://www.murphguide.com/irish.htm#14-59 and
www.menupages.com. The first one lists all the pubs in certain areas and the second one has good reviews for restaurants across the city.
Ah, I remembered one. We went to the Irish Rouge during Christmas break for an Aggie Bowl Game Watching Party. It was a fun place but the food was not that great.
[This message has been edited by BlairAG04 (edited 3/26/2008 1:13p).]