I have to be in LGA for about 5-6 hours, not going to be on a stop over, but a flight in and out of lga on spirit (yes, eye roll, spirit) dropping off a kid. I figure I would just work in a lounge for the day. A few questions, I have sapphire and Amex access to lounges, can I access terminal B if I am flying spirit? Will they let me past security in terminal b with a spirit ticket? Also, are either of the lounges Amex or sapphire, lenient on the 3 hours before the flight rule, as I will be there likely 5-6 hours before my flight out?