Yes. In terms of the frequency of contact, normally we try for a balance between home visits, where you can see where the offender is residing, and visits in the office. We also have what we call a “staff safety assessment template” that has to be completed. If there are concerns, the supervision can take place in tandem: it's not just one parole officer, but two parole officers who actually see the offender.
In cases where there are concerns about potential gang activities, you're quite right, the visit may also occur at the police station, the office or elsewhere, but certainly not in the offender's home.