I recommend getting a room at the hotel in the airport. I don’t remember the prices, but they’re fairly inexpensive, considering that your friends are headed to SBH . . . and, personally, I value a comfortable bed, even if only 3 hours of sleep, & a clean bathroom with fresh towels. (At the hotel, however, be sure to tell them that you want a renovated room . . . which generally means a newer bed & on a higher floor.). I’ll add that I know that it would be an extravagance to do what I’m suggesting . . . but as one who has come to “a certain age,” I try to make my travel as easy & safe as possible . . . and for me, three hours in a clean hotel room, conveniently located in the terminal, is preferable to hanging out in dirty, uncomfortable chairs, with few food / beverage kiosks open, bathrooms of uncertain cleanliness, & an environment that risks exposure to ambient Covid.