Five years ago, you’d have been hard-pressed to find a cocktail-craving 30-something headed to a haute bar in Dallas’s design district, a once-industrial enclave centrally situated close to the Main Street district, near downtown. But now the design district is attracting new retailers, deep-pocketed developers and plenty of shoppers, thanks to a slew of buzz-worthy restaurants, chic stores and daring art galleries opening alongside brand-new apartments and lofts.