Sangria in Spain
First things first. Have you noticed you and all the other tourists in the bar are the only ones drinking sangria, while everyone else is drinking Spanish beer or gin and tonic? There's a good reason why. Find out more: Sangria Secrets: What Spanish Bartenders Don't Want You to Know About Sangria in Spain.
So if you can't have sangria in a bar in Spain, where can you have it? Try getting yourself invited to a Spanish fiesta. Failing that, make it at home. A Good Sangria Recipe
While the Spanish don't drink much sangria in bars in Spain, there are some similar wine-based beverages that they do drink. Here are a few 'wine cocktails' popular in Spanish bars: Alternatives to Sangria
See also: Sangria Variations As long as it's got wine and fruit in it, it's probably a kind of sangria. Here are a few examples.