I don't play with my eldest (13) at all, but that is not surprising considering her age. We do have "girly" nights when the other two are in bed though, watching a dvd or something. We also have "girly" shopping trips when I can afford it!
I don't actively play with my son (9) but did play a game of football in the garden with him on Sunday. He always has a friend round and they just play in the garden or on his play station.
On a Saturday night (if the children are not at their dad's) I like to make an effort once the youngest is in bed to play a board game - if not Saturday, then I like to Sunday afternoon but not always feasible. We normally play chess, game of life, sorry or a game like that.
My youngest has delayed development so her play is mostly geared around learning - but then I suppose all play is learning. She loves cooking, so I try to make time to bake some cakes with her (out of a box, mind you, I am not very domestic in that way) but it is good for her fine motor skills. She also loves doing puzzles but I normally let her do these herself as it is good for her.
I don't spend nearly enough time playing with my children - working part time - and evenings spent doing reading homework, etc. but I do try.