Like, if you don't tip on a single coffee because you don't carry cash or whatnot that's whatever, no one working will bat an eye
But if you are (presumably) coming in from a tech company to get 40 drinks for a team then you ABSOLUTELY have a way to tip, especially if you're paying with card and it's over $25. You have to sign for that and it asks if you want to tip first, so you have to go out of your way to NOT tip on an almost $200 bill