Asking to join someone's hobby...

[MeatballMeatball]

A friend has just taken up sea kayaking. It's a group of friends that I don't know, and it's all very casual. It's not a club or anything.

I loved kayaking when I was younger and would like to take it back up again. I said that to her in a sort of passing mention kind of way half hoping she'd say 'Come along, we meet on a Thursday'. But she didn't. I can't really ask again can I?

or can I say something like, you sound like you are really enjoying it - I'd love to try it again, no pressure but could I go out with you guys some time?

I'd ask, she's supposed to be your friend so she hopefully wouldn't say no. I'd say yes if it was me

Hmmm... odd that she didn't invite you.
However , she is a friend and maybe she didn't pick up on what you'd said so maybe a more direct approach along the lines of
Whereabouts do your group meet? I was thinking of taking it up again, do you think it would be ok for me to pop along one day?

See what she says.