During the daytime, hang at the library. It's quiet and you can sleep there.
Buses are heated as well. an all day bus pass is just the thing. I know a station for the train where the hobos hang out and offer to "buy" your
partly used day pass. underground train stations stay warm too.
Sometimes conventions can be handy as well. If it's a convention involving food, they'll have free samples. (my friend and I fed ourselves at a
franchise expo for 4 days. )
Waiting rooms of any kind work well, as do browsing in big stores.
THen there's the exhaust vents on college and hospital campuses--generally any complex that is heated by steam will have some grates in the sidewalk
where hot air blows.
Stairwells of hospitals are pretty good too. Medical people generally won't call the cops if you are polite. The higher up the hospital you go, the
cleaner the bathrooms. So you can take a 'sink bath' on the top floor, in a bathroom that hasn't been used since being disinfected. On the other
hand, the lobby men's room will obviously be the dirtiest and busiest john on the property.
I've napped in a few hospital beds. Bed control/housekeeping will often have a floor or wing that is closed for renovation, or being cleaned etc.,
and you can often find a bed that wont be checked for 8 hours. ScORE!
In the 'burbs, keep on the lookout for abandoned/unoccupied houses. Even if you aren't will to break in and borrow the fire-place, you can always
sleep in a vacant dog-house or other animal shelters in the yard or behind the outbuildings. Keep your mind open. In upper class communities, you can
find "hobby farms." Hen houses, goat stalls, and horse barns are all usually 10-30 F above the outdoor temperatures.
If there are vacation homes, those often have great possibilities. Usually the richer the owner, the larger the property and the less its in use.
Docks and marinas will have boats, and as long as you aren't sleeping on a surface that contacts the water, you can get out of the wind and
edit on 6/5/2016 by redempsh because: (no reason given)