I can understand why. Next time don't use that, is incorrect (would translate as a strange "an, other"). The correct way would be either just "otra" (another) or "una más" (one more), generally followed by a casual "por favor". Take in mind that beer is feminine in spanish so you have to use "otra" (not "otro").
Many other alcoholic drinks are masculine, but are often served in a coup or bottle, that are feminine nouns. You can ask for "otro vino" or "un vino" but "una copa de vino" (a glass of wine) is also common. To use "un más" instead the correct "uno más" (one more) would be also a common mistake.
When I was forced to travel for work now and again, my instincts were always to find a bar with a decent food menu. It's usually as good (better?) plus it was easier to buy a properly sized meal without all the extra filler.
Also, extra bonus points for things that are a hassle to make at home (typically sushi). Restaurants lose their sparkle as you age. The Sysco truck goes to practically all of them anyway.
There's something to be said for the super old school diners (typically Mexican restaurants in the places I grew up in), but those are towns that scarcely any HN readers would have wandered into.