Location: Cappuccino Bar, Via Arenula, 50, 00186 Roma RM, Italia
Getting there: Belli station
Classic Italian bar
Specialty: Coffee, focaccia and pastrami
Price range: $ (<20)
Pro tip: It is not exactly in Trastevere, but it is just crossing the Tiber river. Best option if you stay in Trastevere
Recommended by @Pitufueros