Do I call him? He left a business card...?

Im a server at a local hookah bar.... one night last week a really cute guy came in with his friends for a smoke and food. I could have sown he was staring and smiling at me through out the night... but I thought it may have just been me imagining it. When I went to clean off their tables I saw that he left two identical business cards on it! I am sure they belong to him because the logo corresponded with his work shirt... but I am unsure if he left them on purpose of as trash. They were brand new.... and about an inch spread apart on the table. Do I call him? Were they for me? If I call what should I say? I quit working there on Saturday and he left them probably on Wednesday night or so. Hmmm?