@georgeob1,
Hey, thanks for your suggestions. We are going to spend two days in Montevideo between BA and Rio. I want to visit Punta del Este and Colonia on day trips. We have booked all our hotels now.
Aside from the polo lessons we've arranged, and the planned tours her company is putting on, I had the idea to do a couple of boat trips - maybe the Tigre system - I saw that in Frommer's. I saw we could also do the one you suggested, and I'd really like to do that. Also, we're going to take the Buquebus and ferry from BA to Montevideo.
Since we're going to be there, we'll certainly have to do something about tango - maybe take a lesson and then go and watch the experts.
Will let you know what the vibes are - how they compare to yours.
I'm also interested in doing some yoga and maybe taking some zumba classes down there, comparing them to what I do here. That'll be Rio, of course, since zumba's a Brazilian phenomenon. We're staying at a hotel right on the beach there, but in BA we're in Las Canitas, I believe. I've read all about the different neighbourhoods there and Recoleta is lauded.