Argentina
This is a website that's very useful for finding particular types of nightlife in Buenos Aires, covering everything from venues/nightclubs where you can hear your style of music to restaurants where you can eat a type of food you're looking for. It includes reviews and ratings for every place and is very easy to use and find what you're looking for.
Guide to Gay Buenos Aires is a non-commercial community web-site compiled by a British resident and contains listings of gay hotels, apartments, bars, dance clubs, shopping, tango, spanish tuition, saunas and much more.
It's an agency that provides apartment rental in BA - well worth it if you are staying in the city for more than seven days. As with most capitals, hotels are expensive here and you get greater freedom having your own place, as well as it being more cost affective.
www.welcomeargentina.com (general tourism);
www.interpatagonia.com (general tourism);
www.easybuenosairescity.com (Buenos Aires tourism);
eat.11y11.com (restaurant listings in Buenos Aires)
To keep up with what's going on in the city, try WUBA (What's Up In Buenos Aires), a website run by an expat American living in Buenos Aires.
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