Meh, rarely. I feel like it is an invasion of space and it is just awkward. The only people I would let tickle me is my brother, sisters, or my mom....it even feels weird when my uncle or dad does.
That's not to say I'm not ticklish
(though I am pretty good at keeping a straight face because of drama), but I try to tell people that I am not ticklish and they give up. Plus, I'm not ticklish in all the normal spots.
However, I do like tickling little cousins, they are so cute! 
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Go die in a ditch if you're a b*tch, if you're a jerk, go to work, if you're just mean, flee the scene, and if you're rude, go ahead and intrude because you're probably just like me.