Here are two samples of the same cruise on different dates just to get an idea. This is for traveling in 2010. They don't have much online for 2011, yet. The rates are lower in January, and if we go to Mexico, the weather will be warm there even at that time of year.
http://www.carnival.com/Itinerary.as...Date=2/25/2010
http://www.carnival.com/Itinerary.as...ailingID=47913
Rates are based on two people per room. I personally, due to being claustrophobic, would really perfer to have a balcony or suite. I need to be able to walk outside whenever I feel like it. Hopefully someone would be able to share with me if we don't bring our spouses.
The interior rooms are the least expensive and have twin beds, which would probably be the most comfortable for people who don't know each other well to share. The other rooms have one king or one queen bed, however, the balcony rooms and suites have couches that can be used as beds. If sharing a bed is a problem.
If we get serious about doing this, we can check other itineraries, leaving from other ports, and other cruise lines. I've heard that Royal Carribean is better than Carnival. Hubby and I were on Carnival.
BTW, if we have a group that wants to go, I'm in!!