Instead of working out of a Starbucks and paying for “rent” through coffee and tips, you can just as easily enter a random office building (the bigger the better), find a desk that’s obviously free, find an empty ethernet socket and plug in. If anybody asks who you are, say you’re from IBM/HP/Dell (look at which brand the desktops are) and that you’re here for “the computers”. I’m pretty sure this works about 95% of the time. (I could certainly spend several days without being noticed at certain customers, like I am right now, killing time before my contact person arrives.)
