This looks like it could work, better have some menudo to make sure:
One of the guys working the truck hands you and your friend a Gallo Draft in a small paper bag and you watch your friend take a few sips before returning it. You follow suit. The bartender/ceviche slinger then fills your Drafts with ingredients in this order—a spoonful of salt, a spoonful of chile/chopped onion/vinegar mix, a generous squeeze of lime, a generous squeeze of Worcestershire sauce and another good dose of lime juice. The beers are handed back to you, the paper bags wet from condensation and a bit of lime juice.
You take a sip. You feel revived. The spice of the chile jolts you out of your fog and the tang from the Worcestershire sauce, lime, and the bubbles from the beer perk up your tongue. The onion settles your stomach and the salt makes you crave water (Hangover Cure 101: Drinking lots of fluids is a good thing). Your friend watches you with knowing eyes, as the power of the picocita takes its effect, instantly changing your outlook on the day.