As for walking tours the city tourism web site has some good suggestions along with a lot of other good information www.bue.gov.ar
As for hotels in the Recoleta the Art Hotel is very nice....http://www.arthotel.com.ar/ It is small, but the service is good.
The Bel Air is a nice one too here is the web address but Hotels.com have had much cheaper rates than the hotel web site so check both http://www.hotelbelair.com.ar/
Another option is the Design Suites Hotel http://www.epoquehotels.com/h.php/bu...tesbaires/l/en
Or if an apartment might work for you the Concord Callao at Callao 1234 has some nice studio apartments that rent for under $100 usd a night including maid and high speed internet. You can book them at http://www.temporaryapartments.com.ar/

As for the drink offer, thank you but I have returned to the US since winter is now coming on in Argentina. Last May was the coldest in 48 years so decided to avoid it this year

suerte
SAM