Looking for another single parent

Trying to find out how I can find another single parent. No luck on a few dating apps and looking for some company this weekend. Any ideas where to look or try? Heres my situation, 40s dad in southbay looking for another parent who would like to join me and my 3yr old at kid friendly family friendly work sponsored event this weekend. Lots of kid activities, lunch provided and booths for kids. Just looking for another parent to hang with and offer another parent the chance to take their kid to a great event for free and possibly some play time with another kid. Thanks