During the 1950s, smoking was much more socially accepted and prevalent than it is today. Smoking was commonly portrayed in movies, advertisements, and popular culture as a sophisticated and glamorous activity. As a result, those who did not smoke were often in the minority, and their choice to abstain from smoking might have been viewed with some curiosity or skepticism.
While not everyone who chose not to smoke was necessarily looked down upon or considered weird, there might have been some social pressure to conform to the prevailing norm of smoking. People who didn't smoke might have faced some social challenges, such as being excluded from certain social circles or feeling like they didn't fully fit in with the majority.
However, it's important to remember that attitudes and social norms can vary significantly depending on the specific community or cultural context. There were certainly individuals and groups during the 1950s who valued health and had concerns about the harmful effects of smoking, so not smoking was not universally stigmatized. Additionally, there have always been people who chose not to smoke for personal, religious, or health reasons, and their choices were generally respected even if they were in the minority.
As awareness of the health risks associated with smoking increased over time, attitudes towards smoking shifted, and smoking became less socially acceptable. Today, not smoking is widely regarded as a positive choice for one's health, and social attitudes have evolved to support and encourage smoke-free lifestyles.