One would have hope that the lesson learned here was that, while at "work" (volunteer or otherwise), one should engage in work, not attempts at fostering romantic relationships with coworkers.
I have to disagree with you folks on this. Many many long term relationships and even marriages are due to work place contact.
I also see no issue with offering one’s phone number to co-worker.
This situation is obviously much more than simply a person seeming to “have a drink” with a co-worker.
the ops “reading of the signals” such as “side glances” is seriously creepy. So what if another glances your way. Especially given the op added that there is proof of these side glances available on the security camera footage, it suggests an unhealthy review of others actions. Maybe the nurse was discretely observing the op due to some concern with a behavior exhibited by the op and was simply remaining vigilant for her safety.
As well, the claim that pink scrubs somehow suggested flirting. some hospitals actually mandate department colors. If the colors are not mandatory, pink is not an unusual color for a female to wear. Additionally pink is considered to be a calming color so it could actually be worn to benefit the nurse in her duties when contacting patients.
The op has shown a level of defense that suggests their actions were much more than a simple note seeking a date with the nurse. It shows an unhealthy thought pattern which leads to a very poor interpretstion of others actions.