Cash and all major credit cards.
If you're getting your photo opp in at The Forum Shops' Fountain of the Gods, stop into the adjacent Trevi restaurant. The Oval Bar inside offers all of your favorite drinks as well as signature cocktails and a nice selection of Italian wines.
Be sure to time your stop for Trevi Time, the restaurant's version of happy hour from 2 - 6 p.m. daily. Enjoy half priced mixed drinks, beer and wine by the glass as well as Trevi Bites for $6 each. Try a frozen bellini or the Italian Marga-tini with tequila, triple sec and lime, topped with Amaretto.