Tango shows are absolute smoking areas, there is no tango show that has a non-smoking section. If you are a vegetarian, you can expect only the worst vegetarian cuisine imaginable. The architecture is lovely. The prices for North American's are quite reasonable. People will tell you that you can use dollars in most places, but you must be prepared to receive pesos in change.
Dollars are welcome for high-end purchases.
Cashmere outlets are full of beautiful bargains. Sweaters, too, in all colors, knits and sizes. Some finished off with leather, which is another good buy due to all the beef consumed there. My recommendation for the best is a well reputed selection of Malbec. A cross between Merlot and Cabernet Sauvignon to my taste.