£70m was staked on fixed-odds roulette machines in Exeter betting shops last year.
The Campaign for Fairer Gambling, which published the figures, is especially concerned about the effect on younger people, and the rise in use in both poor and affluent areas.
They've been described as the 'crack cocaine' of gambling because up to £100 can be spent every twenty seconds.
Teenager killed after getting out of ambulance on M5
He crossed carriageway before being hit by car
Thugs jailed for 'ferocious' attack
16 months for beating up man
Public asked for views about Devon libraries
You may be able to use them when they're closed
Christmas cancelled in Crownhill
Lights out to save cash
Hourly services return on Exeter to Waterloo line
Speed restriction removed on SWR line
£1 million Exeter Quay bridge axed
'Doing nothing is not an option'
