The act of scanning a license that you provided at the door does not fit with any of the 4 recognized torts for invasion of privacy (Intrusion, Appropriation, False Light, Public Disclosure of Private Facts).
However, keeping the information scanned must be done in accordance with the requirements of NRS 603A concerning the personal information collected.
Concerning whether the act obtaining the information via scan without informed consent violates Nevada law, such act does not directly violate NRS 205.463-465, or 205.46515 (identity theft statutes) without intent to use the information for an illegal purpose.
Accordingly, don't hand someone your drivers license to someone unless you intend to consent to information being retained. An alternative would be to explicitly limit the businesses right to retain the information prior to handing them them the license.
The above information is given for informational purposes only. The response to your question in does not create an attorney/client relationship, and no guarantee of privacy exist. If you find the information to be helpful, please check the "helpful" box.
I suspect that the bar has no interest in the data by morning. The only establishments I've seen do this are ones with clientele that is likely to, well, start trouble, help with trouble, and end trouble.
Their interest probably begins and ends with handing it to metro if they're called out . . .