From what ive seen where I work.
The best advice is to ring ahead and try and make an appointment with the CP/CFI. People that just rock up unannounced will NEVER get a look in. Most the time they are out flying themselves/doing paperwork ect. Be nice to the person behind the front desk. You never know who they are. Even if they are just a receptionist, if you **** on them, your resume wont get much further than the recycling bin. If the CP/CFI doesn't want to see you then perhaps there are no jobs going or you're not suitable for the job. Hope it helps and good luck with the job hunt