Recently I've been going to a couple of open mic nights - one at my local bar that's just gettting up and running & one at a nearby pub that's well-established.
The established one is run by a group of Windrush generation musicians who play all sorts of reggae influenced music. I've heard loads of songs I'd have never come across & leant the bass parts so I can play at the night.
The open mic at my local is a bit chaotic at the moment, with people with all different tastes in music wanting to play. As a result, I've told them I'll learn anything as long as they tell me in advance, and it's working quite well so far & I'm listening to & learning all sorts of music.
The only problem is in response to the question:
Me: "So, you do play it in the key that is was recorded, don't you?"
Them (various): "Oh yes! Of course!"
Song starts...
Me: "What jeffin' key are you playing it in!?!"
Them: "Erm...I'm not really sure."
Or...
Them: "Oh, it's in Am"
Me: "Fine, but you're not playing it in Am."
Them: "Oh, is this not Am?"
Me: "No - that's Em"
Them: "Well, I just put the capo on here for a change..."
Me: *sighs* "Ok then."