It was very cool. I have a CD now, but only one because that is how much cash I had. :(
The lots of other people know real dances, and did very spiffy actual dancing in circles and pairs and lines and trading partners and weaving in and out around each other and this odd one where three people would dance and one would kind of watch them (pretty much everything was based on groups of 4 or in some cases 8). Also they started one of those thingies where everyone holds hands and skips around in a long line, which andres_s_p_b and I got pulled into. There was leaping involved. Clearly I need to incorporate leaping into my daily exercise routine, because my little legs were kinda wobbly after that song.
Then we went and got ice cream. Tasty, but not as good as Amy's. Nothing is.
 This seems an apropos time to mention the Rules of Asking Me to Dance. The rules are: You may do it once per half hour or so. You may phrase it as an order ("Come dance!") once. If you ask and I do not want to dance at that moment, further prodding (especially in the form of arm-tugging) will make me Extremely Grumpy, and highly unlikely to dance at all for a good long time, even to songs I like. If there are any songs I like that I don't get to dance to because I am being Grumpy, I will be mad at you for stopping me from dancing to songs I like. So don't do it. I really ought to get this written up on a card I can wear around my neck, because people I've just met often think I want to be cozened or forced into dancing, which backfires spectacularly and leaves no-one happy.
There are two conditions under which I will dance:
(1) There are actual steps, which I know.
(2) I really like the song.
If neither of these conditions applies, I will not be dancing. As long as general conditions are good (I'm not exhausted, the music is not too loud, there are enough people dancing that no-one will look at me), either one is sufficient. I ought to point out somewhere here that I do not in fact know any actual steps, so if you want to get me to dance to a song I don't particularly like you will need to teach me some.