My girlfriend and I are going to be spending a month in Costa Rica (Feburary) and are hoping to start our trip off with a week long Spanish course. We've never been to Costa Rica before and are not sure if we want to spend our first week in a big city like San Jose. Any suggestions?
First of all you should find out where you can take this Spanish course you mention. Apart from San Jose, there are institutions in Heredia, Santo Domingo de Heredia, Alajuela, not to mention those on the Pacific and Atlantic coasts. Search Google or Yahoo for "spanish courses in Costa Rica", and you'll be busy for some time. Most institutions arrange for accommodation with local, spanish speaking families, so that you will have ample possibilities of getting to know the country and its people.
Therefore, no need to worry about spending a week in a (big ?) city like San Jose on your own.
I agree with Fraluchi - you can just about go anywhere in Costa Rica now and take Spanish Lessons. If you fancy being in a town, or in a beach village there are many options.
I would do some homework, and look at prices, locations and accommodations - I would definately recommend living with a homestay family as you will learn so much more by being immersed in family life!