I also did something similar with a local dance group that went onto competing in a National Championship. They offered advertising space on their T-shirts and I bought advertising space and I simply added the Bitcoin symbol and a link to Bitcointalk.org to their outfit on their left arm. 

They say that they got a lot of people asking about Bitcoin, when they went to the Nationals and they referred all of those queries to the link provided. 

There might be people using this forum, because of what they saw on that T-Shirt.    Something small like this can make a difference and it can increase Bitcoin adoption.