I'm planning on booking a room with priceline for an upcoming trip to Mexico City. I already booked a hotel through expedia, although I wouldn't mind changing it for a better room for the same price, even if it's not in the area where I first intended to stay.

I'm traveling with a friend, and we need a room with 2 beds, bot booking through priceline I only choose the number of rooms, and not the number of people traveling. Based on your experience, what are my chances of getting stuck in a room with only one bed and without the possibility of changing it for a room in the same category but with two beds at the time of check in?