Further to the post types of venue were wrestling took place I discovered from the excellent ITV Wrestling website that in 1966 there was a broadcast from "the Miners Scheme" Coalville in Leicestershire. Any ideas exactly what the Miners Scheme was?
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Talk Wrestling
Share your memories of British wrestling 1930 - 1988
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The listing is for "Miner's Welfare Scheme", which would have been what provided social and support facilities for miners. I did find a mention of the Coalville scheme having a swimming baths that could be boarded over to use as a hall in winter, so that could well be the venue.
https://www.dmm.org.uk/welfare/1929f-01.htm