In Philadelphia, where 1 percent of the population is Muslim, according to the Pew Research Center, City Councilwoman Maria D. Quiñones-Sánchez, who attended the program in her district, couldn’t cite data on the number of Latinos here who have converted to Islam. Neither could Naser Khatib, the imam of Masjid Al-Hidaya. But he said the Latino Muslims at his mosque are mostly women who came to the religion through marriage.