how old is too old to rush?

I’m probably not going to rush I’m starting college extremely late(medical problems) at 23. but out of curiosity I figured I’ll ask. At what age is it just weird to rush a fraternity. Also, UCSB is one of my 3 choices. Are there other 23-25 year olds(will graduate at 25) in isla vista, who are actually chill and fun to be around? Or is that just too old?