Please be aware that some countries/resorts charge a separate daily fee per room or per person and although the fee is usually nominal, these fees are not included in your booking unless specified, and are your own responsibility. Resort/facility fees are becoming increasingly common in America and Mexico where initially the room rates seem very inexpensive, as a way for them to top up their total earnings. If the fees have not been made clear to you in advance on your booking paperwork or on your arrival, you may be able to contest them as unfair trading practise but this is down to your own choice.
These fees are much less common outside of the americas.