These hardy succulents are sometimes called Hens and Chickens.
Apparently so named as the main plant is considered the hen, with the surrounding offsets being the chicks, right?
To whoever thought that up change your drink I say. In fact, considering that they are also known as 'Houseleek', how about stopping drinking altogether.
If anyone can fill me in as to how or why they got these names then please do. I wait to be educated and shamed for my ignorance. That said however, I think 'houseleek' is a terrific name as indeed is sempervivum from which the other common name, 'Live Forever' is derived.
I picked four of them up at a garden centre the other week. I've planted them in a shallow terracotta pot together with a Lewisia which I placed in the centre, another pretty succulent which I hope will flower in a few months, apparently they're a little tricky.
Drainage is the key to success with these plants. I've not come across horticultural grit in any of the usual places in this part of the world except for this product in the picture.
Pouzzolane is a volcanic rock. Not only is it really efficient at improving drainage and structure of the compost, it makes for a really pleasing decorative mulch as well. Sadly it is ludicrously expensive so my search for standard grit continues.
I'm going to leave this little pot just where you can see it on the wall in the courtyard this summer. My fingers are crossed that these hens will have lots of chicks and the pot will be brimful!