I can still remember - and quote - some of the routines* in the panto (Aladdin) I was taken to aged 5.
Pantos can be found everywhere from temples of drama such as the Old Vic to local am-dram outfits and everywhere in-between. For example, this year I could see panto at the big Glasgow or Edinburgh 1000-seater theatres, the regional repertory theatre, the nearest big town’s art centre or my small town’s am-dram org putting one on in a church hall. (My daughter will be playing the coveted role of “it” in the “it’s behind you” scene in the latter, and I am totally stoked for her).
For a professional theatre, a panto with a named star can more or less sell out every house from late November to mid-January; they are essentially the economic lynchpin of British theatrical culture.
On family-friendliness, as others say there are saucy asides and double-entendres that go over children’s heads but there is an absolute art to this. You simply cannot have the adults laugh without the kids - because then the adults stop guiltily, the kids ask what’s so funny and the momentum is lost. You’ll get away with it once but it can’t be a recurring pattern. So the art of the writer is to give both adults and kids something to laugh at the same time.
A good pantomime is made by: quickfire jokes; slapstick; audience interaction; a hissable villain; just enough sentiment to make the audience cheer on the goodies; a pervading sense of anarchy that it all might be about to go wrong.
The skeleton on which these hang is: a familiar and easy to follow story; a panto dame; call and response scenes (it’s behind you, oh yes I will/oh no you won’t); comic relief character/double-act; a love song; sing-alongs; a slop scene (e.g. custard pie inna face, wallpapering gone wrong).
I’ve had a go at writing** a couple for work/fundraising and even knowing all the elements I needed to do, it was a struggle to get them all in in places where they worked.
*Comic Relief 1: I know a magic spell that will get you a lovely surprise.
Comic Relief 2: Show me then!
CR 1: You say “Busy bee, busy bee, what have you got in your hive for me” while doing the following actions.
CR 2: Show me again!
CR 1: (With actions) Busy bee, busy bee, what have you got in your hive for me? Now you go.
CR 2: Right!
CR 1: Takes big swig of drink
CR 2: Doing actions in even more OTT and ridiculous way: Busy bee, busy bee, what have you got in your hive for me? Winds up face to face with CR 1
CR 1: Jets big mouthful of drink into CR2s face
Young Stanislaus: Passes out, at this, the very acme of comedy.
**(and directed, and performed in as Ugly Sister. I am, it turns out, a massive ham.)