They sell sodas, waters, Radlers, Spezi, etc in the Getränkecenters too, and some have wine, though not a whole lot.
The Hofbrau Helles was solid. Not amazing, but better than most of the blonde ales/whatever you can find in most brewpubs in the US. We just had the one liter then left. My friend was getting annoyed at the bad service, so I didn't want to stay any longer than that.
There's a brewery called "Unertl" I'd never heard of before. I don't think it's exported to the states. My friend said it's the best weizen in Bayern. I think Schneider's Tap 7 "User Original" is slightly better, but Unertl is still very good. I'd definitely grab some if you see it.
So far I've really enjoyed Munich. It's really easy to get around by the subway and suburban trains. It reminds me of New York, but cleaner, cheaper, less-crowded, and with friendlier people. So I guess nothing like New York. . .
The Innenstadt is pretty crazy. It's kind of like Time Square. It's where all the tourists go, and it's expensive. Once you get a few blocks away from the touristy parts it's very quiet, clean, and a lot cheaper, too. A dinner may be 10-15 euros in the Innenstadt, but next door in Maxvorstadt it's more like 7-8, and if you keep going to Neuhausen it's cheaper still.
I've been using the ATMs from the Hypovereinsbank. I exchanged some money in O'Hare before I left, just to be safe, but it ended up costing me 13% due to the fees and bad exchange rate. The HVB ATMs give me exactly the exchange rate you see if you google "usd to euro," with no fees or anything. I haven't used any others, so I don't know if that's typical or not.
I really haven't been drinking all that much. The Viktualienmarkt is rad. If you're into good seafood, chocolate, and cheese, that's a pretty good place to go. Some of the produce there was really good too, if you can cook. I've been picking stuff up in the city and cooking at my friend's house most nights.
If you like parks, there are a ton of those. It's also pretty rad to just walk around and look at all the weird old buildings. I think the S7 (suburban commuter train) goes to Aying. I should make the trip down there next week when my friend goes back to work.
As far as restaurant etiquette goes, you need to ask for the check. You say "Bitte, kann ich zahlen" or something similar. The lady comes over, gives you the total, opens her change purse, and gives you your change. There are probably a lot of different opinions on tipping here, but according to my friend tipping isn't necessary, but if the service was good, 10% is reasonable. If the service was great, maybe leave 20%.