EVERY YEAR IN APRIL THE CITY OF SAN ANTONIO PUTS ON A PARTY THAT LASTS ABOUT 2 WEEKS. IT IS BEFORE THE HEAT OF THE SUMMER AND THE WEATHER IS STILL PLEASANT. YOU CAN GO FIND SOMETHING SPECIAL TO DO EVERY DAY AND EVERY NIGHT. MOST THINGS ARE SURROUNDED AROUND FOOD AND ALCOHOL.
NIOSA OR Night In Old San Antonio is a good example. Go early and enjoy the food as it gets really crowded as the evening progresses.