I've never tried working from a coffee shop but it seems people do. How does that work out financially? I imagine they aren't too pleased if you just buy a coffee and then occupy space for 5 hours. But I don't really want to spend a fortune on excessive caffeine consumption and $5 bagels.
I did this for two years. The key is to switch it up. I'm lucky enough that there are many different coffee shops in my area that I can go to. The general rule of thumb, if you're planning on spending multiple hours in a single place, is to buy a little something each 1 to 2 hours. I've seen many, many people buy a single tall coffee, nothing else, and then sit in the coffee shop for 4+ hours. These people are jerks.
But what if there's plenty of seating, and they're working off of their own internet? Are they still jerks?