In Jamaica, these rafts are very popular to float down the Martha Brae River. The Rastas do all the work and you sit in this bamboo chair. There are plenty of coolers selling beer on the side of the river operated sometimes by old ladies! You will also see Jamaicans smoking "spliff" on the banks and your own guide may be doing it too!! It is unfortunate that this country used marijuana so heavily because Marijuana causes one to lose their ambition. This is a country that has great potential on the tourist circuit, but the locals are stoned and just can't seem to get around to improving things. I have been here 5 times anyway.