Diesel,you have sold out! sorry buddy you are no longer a T-man but a Richard Simmons wannabe.There was that the flame you were looking for? 
Seriously,I wish you luck I spent a long time working as a PT in the commercial clubs,the best way to get business is to just talk to people.
I would always introduce myself,then have a chat with that person,find out their training goals,how long they had been at the gym,what they did for a living,what their interests were etc,etc.Then after a pleasant 10 min chat I would leave them.
Next time I saw them I would say hello(always remember their name it says a lot) make small talk,have a look at their programme and ask them if there was anything they were unsure of,or would like to change(there always is).
This time I would spend 15-20 mins with them,no charge just advising them on a few things,or maybe showing them a new exercise.
I can honestly say that after that 90% of the time,once they were showered and changed,they would approach me and ask if I could fit them in for a PT session.
This worked for all trainees,I ended up coaching people from Professional Cricketers (I am in the UK) to Powerlifters,and lots of unfit women who were looking to lose a dress size.
Within 3 months I was fully booked up and actually had a waiting list.
These are a few of the mistakes that I have seen a lot of other Pt make,so if you can avoid these you should be ok.
1/ Giving free sessions,If you do this you shall be plagued by timewasters,do not worry if other trainers do this,you are different.Plus it is very hard for people to put a value on something if they have received it for free.
2/ Not giving client full attention.This happens more than you believe.
3/Do not trust the other Trainers,you are in competiton with them.By all means be friendly to them but never confide anything in them.
4/ Never discuss clients,with other trainers or other clients.
5/Never complain about your personal life to your client,they really do not want to hear your hard luck stories.In the world of the trainer,the sun always shines.
Good luck hope it works out for you.