Just went to what used to be Maria's on 4th and Union and found that it is now called Mercado Social. The place is under at least partially new ownership and they've made some changes. I think we showed up during the "soft opening." A slightly new look, but it's really the menu that's different. The menu at Maria's was pretty huge, but Mercado Social is keeping it simple. At our table, two of us had skirt steak, and two of us had tacos (chicken, steak, and chorizo). Everything was very good. The tortillas (which you can now see them making through a window outside) were particularly delicious. Perhaps the highlight, though, were the drinks. Maria's used to have a blood orange margarita that was really good, but the new owner (who is, apparently, quite a bartender) has revamped the drink and added agave nectar. Not too sweet, very delicious. I think the place is definitely worth a try.