Hard to say. Only one person ever told me they thought I might have ASD, and that person was studying autism and had lived with me for a few years. The people I mix with tend to be fairly polite and mostly wouldn't be that forward about what they thought of me. I told somebody I had ASD once, and they looked surprised and said "you certainly hide it well." And as others have said, most people don't know what ASD is anyway. I've almost certainly come over as odd from time to time, perhaps less in recent years.
When I handed in my diagnosis at work, a supervisor said "that explains everything." I never found out what they'd found inexplicable about me before. But that was in the workplace where the demands of the job were running counter to what I could cope with as an Aspie. It was an unusual situation - I'm not saying purely social situations are easy to get through without raising people's eyebrows, but I think that workplace situation was worse, because there were a stack of demands on me and my performance was being watched.
In a purely social environment, as long as I can look comfortable while I'm being mostly ignored, I don't think I'd stand out as being particularly odd. I usually get through social situations without making a spectacle of myself, I just find the effort rather tiring and painful, and I rarely get anything out of them.