Invited to a singles mixer

Late 40's here..was invited to a singles mingle event this weekend. The best part is that it comes at no cost to me (especially as a guy) except for time. I've never signed up for dating apps and Facebook dating was recommended but other some bare effort "likes" and three word conversations, that was a wash. Has anyone experienced such events? It reminds me of the late 1990's/ early 2000's where these types of gatherings were far more naturally occurring.