As a DM dice are there to make noise behind the screen and raise tension. They're a psychological tool as much as they are a randomizer.
Personally I play a lot of World of Darkness games, which runs on dice pools, so if I can just keep obviously adding more and more dice to a pool, recount once or twice and roll to really sell the illusion that they may be in for something a lot bigger and scarier than they are. Or just roll a handful of dice as moments are going on, give a facial reaction and let that simmer under the surface for a while.
Certainly coffee houses do have historic basis in our own reality but the highly commercialized omnipresent franchises with extensive supply chains like IRL Starbucks would definitely be a bit more anachronistic, especially in an adveture friendly world where monsters and bandits are waiting outside the walls of the city waiting to ambush cargo shipments.
Something like that probably wouldn't have been even remotely possible until the age of Mercantilism well after the medieval period gave way to the Renaissance and eventually the age of exploration.