I just turn mine inside out

If you're looking for an alternative because I do not reccomend playing that game, I buy all of my work shirts from the sale section of target. I have a bunch of plain black blouses, long sleeve and short sleeve, that I got for like $5 each. I'm sure any similar store near you (Walmart, kohl's, etc.) would work.

Starbucks graphics, have never gotten in trouble for.

Having graphics is one thing I’ve seen both stores I’ve been at enforce, especially no logos. If it’s like a tiny graphic like on one side of the chest area, you may be able to get away with it hidden but just know no graphic tees is explicit so could be a “hey don’t wear that”.