Yup i have done:
pills,kat,coke,acid,shrooms.
I don't regret spending alot of my weekend flying on something from 18 - 23 but i would not recommend people waste all that money because when my fiancee finally got me out of it i never really knew my friends, the only thing we knew how to do was take drugs together and have a party.
I live by a simple rule though, mon-thurs i do not touch alcohol or drugs and that worked out really well for me because a few people i knew got into drugs a little to heavy for my liking. I also said i would in my life never try heroine, not even to experiment.