I have checked the Booking.com site looking for Centra Centre hotel station where is located in China town, Bangkok. The Centra Suite room cost about 68$ for 4 people.
By the way, I have checked the Agoda.com site for the same hotel, the Centra Suite room cost about 68$ too, but it is for 2 people only. And the 2 rest of us need to pay for extra bed.
So between these two sites, which one should I believe?