Midos

I'm going to be visiting NYC in the week after Paddy's day with 13 other Irish guys and girls, about half of whom are 18-21 (the rest are over-21), and we'd like to be able to go to some clubs together while we're there. Can anyone recommend any clubs in the Midtown area that will admit over-18s? I've already heard that Club Pacha's worth a look on Fridays but I'm looking for places for Thursdays and Saturdays too. Is anything on Paddy's day worth trying out? Cheers.