This is how I've translated it in my tourism texts.

Tapa-hopping is part of the convivial Andalusian way of life. With a few friends you stop in at several bars to have a glass of wine and sample the tapa specialities of each. It's customary to stand up at the bar.
http://www.andalucia.com/taste/tapas/home.htm

Seville is one of the best cities in Spain to experience the famed Tapas Bars. Eating is an art form in Seville, and "Tapa Hopping" is what the locals do, starting at one bar and slowly making their way down to four or five different bars, sipping wine and chatting along the way, until they get full, at which point, they drink more wine! This ritual is called "Tapeo" and the historic quarter is conducive to this kind of fun "culinary travelling". The Santa Cruz barrio, for example, is literally lined with bar after bar, each specializing in various Tapas and Vinos.
http://www.cellartours.com/spain/spanish-cities/seville.html

More refs.
http://www.google.es/search?hl=en&q="tapa hopping"&meta=