Did you know that Tremont 647 and Sister Sorel offer $2 Tacos every Tuesday? Last night, after I returned from my day trip to Philadelphia, Sergio and I were hungry for dinner so we walked down to Sister Sorel for a quick bite. The place was absolutely jammed so we ducked in to see what all the fuss was about. We weren't able to get a seat and I have plans next Tuesday, but I plan on checking this out first hand before the summer ends.
According to the comments on Yelp, it is delicious and worth the visit so if you live in or near the South End and like tacos - this may be a dining excursion worth trying.