Nina, I'm quite sure there must be many quilting groups in a city the size of San Antonio. In what part of the city are you? I don't actually live in San Antonio. I usually say that I live in San Antonio, because when I say that I live in Schertz, people look at me funny and say "Where?" Sometimes they even say "WHAT's that?"
I'm not personally aware of any quilting groups, but I can ask one of my neighbors, who belongs to a couple of sewing guilds. Besides that neighbor, I know of two more who live in close proximity to me who quilt. I know that the one directly across the street does not belong to a quilting group and doubt that she would be interested, although I can ask. Your best chance of finding a quilting group might be through my back door neighbor. I know that she has taken several classes, and her quilts, unlike mine, are both beautiful and perfect.
Betty Ruth