I have a 6 hour layover in BKK in August on a Saturday (Flight TG 659, arrives 1:25 pm and Flight TG 425, departs 7:25 pm), is this enough time to exit the airport and go to the Hard Rock Café and then make it back to the airport in time for my departure. I’ll already be checked into the Flight 425 with boarding passes in hand. What’s the quickest ways to get Siam Square from the airport, and costs, should I hire a car before hand to be there waiting? Any heads up I should be warned about that could throw a wrench into my plans?