Los Tios claims to be the first place in Houston to ever serve frozen margaritas (though instead of fully flavored frozen margs, they offer flavored floaters, served in pretty coupes). Los Tios is also one of the best Tex-Mex spots for throwing parties, with a sprawling indoor patio that gets absolutely packed with friend groups and families in the evenings. Order the dense pork tamales with gravy, a puffy queso—a take on San Antonio’s famous puffy tacos—and beef tacos that come in a unique C-curve shell that allows them to pack even more meat in. The cheese enchiladas are also a home run, served with a char on both ends from sitting under the broiler. Discerning diners might realize as plates start hitting the table that this spot serves corn tortillas only, an unusual choice for a Tex-Mex place in Houston.