Walking around the center at...
Walking around the center at night when the weather was warm. If you just wander around the Duomo or the Brerra you can find anything from live music to vendors selling their goods. There are usually masses of people out strolling around and sightseeing. It's free to walk but there are also many place to stop for a gelato or some wine. A balmy October night sitting on the steps of the Duomo, amongst hords of people, cold beer in hand, listening to a cheesy 80's pop rock cover band.
Don't stand in line
I've noticed that Italians don't buy into the whole stand-in-line concept. At a ticket counter, it's just a crowd of people and eventually you get to the front. It's the same at a buffet. You just walk up to what you want to get at. Granted, don't go knocking people out of the way, but don't be shy.
The beautiful building of Acquario Civico, built in Viennese liberty style, is located in the center of the city, in Parco Sempione.
Surprisingly or not the Milan Aquarium, established in 1906, is one of the oldest in the world.
The stunning facade and the external walls are covered by beautiful frescos, stone decoration and ceramic panels with water world themes.
To eat, to drink, to dance
Nice place on Naviglio grande.
At Matlda, you can eat, drink and dance till 2 am.
Mainly Latin-american rythms.
Staff members (boys and girls with red t-shirt) will learn you to dance salsa, merengue and co ... if you want
Before going to Milan I tried searching the net for a place to rent a bicycle, but had no luck, so I posted a question on the Milan Forum here on VirtualTourist, saying among other things: "I've tried googling in various ways, but they all just want to rent motorcycles, scooters, etc., which is not what I'm looking for."
VT members effeti, icunme and sararosa soon responded with some good advice, and above all I learned the Italian words NOLEGGIO (= rent or hire) and BICI (= bicycle), and when I entered these two words into my search engine I immediately found what I was looking for. (So noleggio and bici are the first two words you have to learn when planning a trip to Italy, OK?)
I ended up renting a bicycle from a shop called A.W.S. Bici Motor s.n.c at Via Ponte Seveso 33, which is quite close to the central station. At first I was put off by the word "Motor" in their name, but they're actually a bicycle shop, and the word "Motor" is only there to make the Milanese take them seriously.
Their rates are 11 Euros per day for the first three days, and 2.60 Euros per day after that, so for five days I paid 36,20 Euros. I also left them 100 Euros as a deposit, which they refunded when I returned the bike.
They were very friendly and helpful, but their bikes were not all in perfect shape. On the first one they offered me the lights didn't work, and the second one had a slight knock in the rear wheel. But in the end I was quite satisfied, and would rent from them again if the occasion should arise.
Address: Via Ponte Seveso 33.