some D's

Daycentres:
A place where a homeless person can be for part of the day, usually incorporates seating and access to hot drinks, daycentres prevent you from wearing your legs and feet out with aimless wandering. Daycentres often have laundy and shower facilities, usually they offer housing advice, sometimes counselling or emotional help is available, and referrals to other agencies, usually they do at least one meal a day as well.
Sometimes there is a clothings store that may be fee or charge a small amount, sometimes bedding is available as well.
Most daycentres are free, some charge small amounts for entry or food, especially if they are independent charity run.
Bigger daycentres offer courses, classes and activities, some even have football and running teams.

Most daycentre staff are there because they care, some are there to be controlling, domineering and treat you like you are five years old, avoid the officious bunch, they are present in all homeless services.

Daycentres don't suit all people, I would struggle to sit in a daycentre all day, if I am using a daycentre I go in, eat, p[ossibly read, have a bath or shower and scram, I have never risked my washing in a daycentre washing machine.
My lifestyle means that usually I spend the day in the library and doing essential other things and going to the church briefly here and there, I currently don't normally use or need a daycentre, but they are vital to the homeless community, because I am solitary and lead a different lifestyle to most rough sleepers, the community of a daycentre is the wrong environment for me, but it is a very beneficial one to most rough sleepers, and has been to me in the past.
If you are a rough sleeper do go and see what is on offer at the daycentre, there may be more than one in your town, check them all out.
Some daycentres operate a barbaric and wrong 'local connection only' policy, this means you have to have been in the area for six months or have immediate family in the area. This means that travelling homeless people are excluded from that daycentre.

Dogs: a good warm companion who will help you to feel secure and will bring you sympathy if you are a beggar.
Dogs need food and care. Daycentres usually know of charity help for vetinary treatment for homeless people's dogs, and people often offer homeless people food for their dogs, some soup kitchens offer dog food for the dogs.
I wish I could have a dog but my homeless lifestyle wouldn't suit a dog, I am in the library and the town so much and until recently I couldn't feed myself properly, let alone a dog.

Drugs:  See addiction