Starbucks does add up, but I would say that it is minimalism (Especially if you are using it as an office)
From an individual's perspective, it is not minimalist, because now you will need to have an entire coffee shop in your life to obtain coffee. However, from a societal viewpoint, it is very minimalist, because now each person can share the means to produce coffee, thus consuming less: electricity, water (assuming most dump some out), coffee supplies/coffee, and coffee brewing equipment (really, we don't all need our own machine... well, I do. but that's why I am a capitalist)
Surely "very minimalist" would entail foregoing coffee altogether. It's a luxury, not a requirement, and not having coffee means that nobody needs the means to produce coffee at all.
If you prefer to buy your coffee pre-made, that's fine by me, but describing it as "minimalist" makes no sense to me at all.
Starbucks doesn't print a receipt unless you want one, and you are welcome to bring & fill your own mug there. You can even use your smartphone to pay.
From an individual's perspective, it is not minimalist, because now you will need to have an entire coffee shop in your life to obtain coffee. However, from a societal viewpoint, it is very minimalist, because now each person can share the means to produce coffee, thus consuming less: electricity, water (assuming most dump some out), coffee supplies/coffee, and coffee brewing equipment (really, we don't all need our own machine... well, I do. but that's why I am a capitalist)