I might be a beginning addict, or I just have an unhealthy relationship with alcohol, but it turns out my absolutely favorite thing to do lately is to go to a larger city, preferably one that I am interested in, and taking long walks while drunk. Taking the long walk home from the pub is casual. Deliberately going out for a 4 hour walk with a bag full of beer and wine is another thing. I put some nice music in my ears, make a plan of at least a few sights to see in the night - of historical or anecdotal significance - and off we go.
Being drunk enhances everything, and being slightly naughty does too. I can take walks, and I can be drunk, but my loved ones expect me to be asleep in my hotel room and instead I'm looking out over some view or building I've read about, gulping a drink and staying covert, looking out for the police. There is no need to write graffiti or steal - just hiding out in plain sight while feeling groovy is danger enough.
Holy shit I really love cities.
Haven't really tried this during the daytime yet. I guess it will happen sooner or later.