The only one I know about is in Rockefeller Center, on Sundays from 1 to 7. It's not a store to buy stuff though, its more of a "lets sit here and play Pokemon" kind of league, however Nintendo World is right upstairs. I'm not sure if there are going to be that many people there this weekend, seeing as how there is a City's that day. But go ahead and tell your friends to stop by.