If you have access to the Admirals club it beats sitting elsewhere.
Newark is not so bad - you can take NJT or Amtrak and be in midtown in 30 minutes.
A Bad Day At Sea [with power] Always Beats A Good Day At Work
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, 2014, Caribbean 2013, Coral 2014, Regal 2014
Star Clippers: Royal Clipper 2015
Last time we had a long layover at JFK, friends picked us up and we went into Manhattan for dinner. We have a great steakhouse in Tribeca (I believe) that we love to eat at when in New York. Five hours might be ok if you can get in the special security lines on your return to JFK.
"The test of a first rate intelligence is the ability to hold two opposed ideas in the mind at the same time and still retain the ability to function."
F Scott Fitzgerald
Seven Seas Voyager (30nts) - Dubai - Cape Town - Nov 14