If you want to each put in just a little more for 4 rooms with King size beds-
travelzoo has an excellent deal where you can get a 5* (yes 5 star) two room suite with a King size bed for $199 per room (the first & only time I have seen a 5* SUITE in Manhattan for that much).
Alternatively they also offer 4 people to a room for $289 but that is two double beds (not queens).
So far that is the only deal that I see that applies to your dates, but look at the site later if you don't book now-
Also these night life calendars may help with evening activities-
Some lunch ideas-
I would also add lunch/ brunch at Central Park Boat House
What ever you decide remember to have fun!