Well One Source Talent is an agency that is getting more known as they add more offices across the country, they currently have 9 offices nationwide right now. If you are a male then I would suggest that you dress conservatively, a pair of dockers or khakis and a nice shirt. If you are a female then maybe a nice sundress or a pair of casual pants and a nice blouse. Don't wear a lot of makeup and you may want to ask them before you go as some agencies want to see you with no makeup at all. I was a model for close to 30 years and this is my advice to you.