Sri Lanka could also be great, and it’s very different. In fact, you might even consider a trip to India itself, which is obviously similar to Sri Lanka. But Sri Lanka is far easier to do in about 12 days, with most of your time spent in the mountains and a bit along the southern coast. Colombo is mainly just good for flying in and getting your bearings. Sri Lanka is also a bit more expensive than Vietnam, but both are great value. And again, you could instead go to Kerala and Goa in India on a short trip, although those are more about relaxation than culture. Let me know if you have any other questions, and I hope this helps. -Roger
Unlike most cities on South America's west coast, Buenos Aires has fairly consistent rainfall all year long, and you might see a bit of the wet stuff even during December. Still, the temperatures should be ideal for being outdoors, and this is really mostly an indoor city anyway, so when it does rain you'll be able to pop into a shop or museum or cafe and have a great time.
As for the alcohol thing, I’m a bit of a drinker myself, so it’s hard to offer advice to an AA person. I guess one factor could be that there are many places around the world where alcohol is so cheap and the days are so warm that many people drink during the day AND at night. If I were in your shoes, I’d probably want to avoid those places. Probably the easiest places to go would be Muslim countries and India because there is little or no drinking culture there, so they have endless evening alternatives that don’t revolve around drinking.
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