Really nice place to chillout - but beware, it might get later or maybe even earlier than you'd expect. Besides, they offer a nice selection of absynths.

One of my favourite Viennese pizzerias - great calzone, great pizza con prosciutto crudo. I never tried the other main courses though.

The other tupalo users spoke out already: On is a fantastic restaurant - in my personal opinion the best in Vienna by far, if you take the price range into account. Gotta go there more often.

Nice cocktails (not cheap though) and nice tequilas - the food is mostly ready-made stuff though; they don't even bake their own tortillas, that's a shame for a tex mex restaurant. Reminds me of some high-bro McDonalds.

I live near the restaurant, and I'm amazed by the constant quality they manage to deliver all these years. Personally, I'm not a big fan of "Innereien" (innards) or "Blutwurst" (a special Austrian wurst made of pig blood, you could called it vegetarian's nightmare), but this is one of the few spot where you can eat anything without risk of disappointment. Big up for the beautiful pearl (schöne Perle).

Update: I published a German review on my blog: http://tinyurl.com/6me56t

It's already been said: noisy, terrible hall, the gas heating in the winter gave me hell of a headache. Just don't go there.

Vienna's best Mexican restaurant - and by far, that is. Tacos Lopez opened about a year ago; the cuisine is authentic and ranges from classic tex mex food to traditional Mexican dishes. Unlike in may other spots, dishes ordered "hot" get delivered hot - the excellent quality of the food (home-baked tortillas, fantastic sauces) soon turned TL into my fav spot. They also run a small shop, where you eg buy "Habanero Salsa", the serious big brother of tabasco and other Mexican stuff.

Definitely one of my fave spots in Vienna - you can't go wrong in a place that offers nice food and drinks, free WLAN and resides inside a building that used to be one of Vienna's biggest private toolshops.
I guess one can definitely call it one of Viennas netculture reallife hubs.