Hi Chris! That's cool...I was a judge for Bacchus before I left Madrid....used to be biannual, now it will be every year it seems.  Interesting!  I guess it will be held in the Casino as usual?  That is near Chueca...
You should check out the Mercado de San Anton near the Chueca metro stop.  Same sort of concept as Mercado de San Miguel but a really different vibe....we hang out there a lot.  The tapas bar on the ground floor has great wines (unusual) by the bottle and the best croquetas...great unusual flavors!  The rooftop bar is great for drinks.   More locals, less tourists than san miguel.  
The Cisne Azul, Calle Gravina, is a super basic but really well known tapas bar in Chueca...famous for wild mushroom dishes. A lot of my friends like La Bardemcilla, Calle Agusto Figueroa...Javier Bardem is part owner....i've been there few times....it's pretty good.  Baco y Beto on Calle Pelayo is good too.  Calle Libertad is fun street to wander...lots of places.  It's really a late-night bar neighborhood...with great drinks places.....just be aware....it is a gay neighborhood and some places are exclusively gay.  
As to restaurants...it's kind of a fine line between some tapas places and restaurants.  One tapas place that is more like a restaurant is Taberneros on Calle Santiago...great food and wine, near the Mercado de San Miguel.  
My two new favorite restaurants are in the Retiro area on the other side of the park...near Goya.  Taberna Laredo and Taberna Arzabal...they are really close to each other.  I already did my post on <a href="http://planetavino.net/2012/12/04/taberna-arzabal-in-madrid-butter-and-truffle-potatoes/" title="Taberna Arzabal in Madrid" target="_blank" rel="nofollow">Arzabal</a>.  Love them both!  
Also recommend Diverxo...the most cutting edge and unique restaurant in Madrid...it you are into tasting menus...hard to score reservations.  
I really like <a href="http://planetavino.net/2012/10/14/cheese-heaven-in-madrid/" title="Cheese heaven in Madrid" target="_blank" rel="nofollow">Cheese Bar</a>, but then I love cheese! 
The Bernabeu stadium is in an area where I didn't really hang out...sorry!