This means you work on having thick skin if they rudely respond - they don’t know your history or background, so don’t take it personally, just smile and move on. Be prepared for whatever response. Maybe they’re in a relationship already, …

Just be friendly, don’t try to hard and if you are witty, you can make some harmless joke. A friend of mine danced with a man and ended up marrying him because he made a joke about her glasses. She could have taken offense but was so used …