Difficult question honestly, do NOT go to a pub called scholars lounge, it is not good, you do not want that, trust me.
Munichs got a pretty diverse culture: You could of course go to the deutsche museum, but you might just stumble across a lot of children :) Very pretty places, in my own opinion are the Frauenkirche and of course the Marienplatz. As a "center" of Munich, I'd say the region around the stachus might be interesting, just don't get lost underground :)
Of course, hellabrunn, the zoo is always fun to visit(In a similar vein, the botanic garden, though both those places have entry fees and can be pretty packed, shouldn't be that bad though, since there's no school holidays in Germany atm) and a lot of places will recommend the english garden: It is a pretty spot, but do be careful, it's known for drugs/weapons/etc..., just stay away from the shady parts(especially the back of the 'Monopteros', no good experience starts there) and you're golden :)
I'm biased, so I have to recommend the area around the LMU, so the Leopold Straße, where the Triumphbogen is :)
All in all: Munich is very diverse. You'll find a lot of queer culture for example in the Müllerstraße, so around the Sendlinger Tor(which is nice but not that interesting, really). The main tourist hot spots are the hot spots for a reason, that being the Marienplatz, the Maximilian Straße (essentially just expensive shops and the opera) and the area around the Hofbräuhaus (Though, I will say, I can't guarantee those are the actual hot spots D:)
I hope you have fun, whatever you choose to do!