Giolitti is one of several superb gelato places near the Pantheon and Pza. Navona in Rome.
The gelatorias are usually packed with hungry tourists as well as locals.
During rush hour (which seems like most of the time!) the dispensing of gelato is frantic as can be seen here in the expression of the waiter taking a customer's ticket.
If you are in Rome, don't miss Giolitti or Tre Scalini for dozens of flavors of the best gelato in the city.
Don't forget that you must pay the "cassa" for your goodie and get a ticket to hand the waiter before you are served.