Emaciated heroin addict Dave, who looks considerably older than his 35 years, has lived rough on and off for the past 12 years. Now he is angry because migrants are stealing his 'business'.
The Thistle opened in January with the aim of getting drugs paraphernalia off the street - where it was (and still is) a public hazard - and giving addicts a safe space to shoot up.
The grand prisoner free-for-all has moved up a gear with plans to free more than 800 of them to tackle crowded jails. And there are plenty of hardened thugs among their number.
It is 2.30pm outside a Wetherspoons pub and Clement Moyo is showing off a GPS ankle tag which means he can be monitored round the clock by immigration officials.
For years, writes GRAHAM GRANT, the Left characterised anyone who had concerns about rising and often uncontrolled immigration as xenophobes and racists.
Bleak scenes are played out every day in the centre of this city, where a world of addiction and despair exists alongside the shoppers, tourists and office workers on their lunch breaks.
It is mid-afternoon in a high street in Scotland and a young man is openly snorting cocaine in a doorway. A few yards away, schoolchildren on bicycles are selling drugs.
There are ominous and all too plausible warnings that the UK faces going cap in hand to the International Monetary Fund for a bailout - in a re-run of the 1970s.