I had such an incredibly kind, helpful, and diligent barista! She called her manager and checked all ingredients labels. She couldn't be totally positive that the drinks were safe, so she made me a chocolate latte without any of the store's usual powders or mixes and gave me a great discount.
I am a coffee addict, and upon being told to avoid gluten I struggled for a place to get coffee. I was told Starbucks was unsafe due to risk of cross contamination, so I tried Coffee Bean, and love it. All of their drinks are gluten free, yes, every single one, no risk of cross contamination. Just avoid the pastries, those are not gluten free. The staff is also extremely nice and willing to answer any questions you may have.