actual and real jail cell and prison (with of course a judge and jury that sends us there) if found guilty by a judge and jury
and make it real .. the only way out is to escape by lockpick or serving Real Time! as in 3 days to 3 weeks if necessary due to the severity of said blemish committed
in addition: if you do manage to escape then you should have a bounty and allowed to be labaled as an escaped prisoner (with bulitens posted including Your Name)