I will be travelling on AA from San Francisco to Zurich in June on a redeye from SFO to JFK with a day layover in New York. I have 4 Sky Club passes from Amex card applications. I am wondering whether it would be feasible to use these in NY or is getting to the terminal a challenge or are the lounges past security and since we have AA tickets could we get past security. The other passengers are my wife and 16 and 18 year old sons. We are most interested in using the showers. Thanks for any guidance.