Those were the days. I was lucky enough to see them in the summer of 1963 in Great Yarmouth.
Ticket prices started at four shillings and sixpence (around 63 US cents at the time). Even better, I didn’t actually pay anything. My best friend’s family ran a seafront guest house and the theatres in town customarily gave small numbers of tickets away to proprietors for promotional purposes.
It was a popular holiday town with four theatres and a number of cinemas that also doubled as live-performance venues which hosted performances by pretty much every British pop star and band of any repute throughout the 1960s. My friend and I saw all of them for free.