I would say a bad place to get it would be in a rehearsal with phillip mccann; but it happened last night....and i laughed my socks off !! The person who it happened to actually stood up and started doing stretches infront of the band. haha
My wife says she remembered this tip that she read in a Doctor's newspaper column (in the USA). The doctor said several people over the years had told him that a bar of soap will relieve the cramp. He wasn't sure exactly where to put it (in this case it was leg cramp)-- in bed near your legs, in the legs of whatever you wear to bed, or on the cramp. My wife put it on the cramp and then just left it in bed with her and found that it really works! The Dr. couldn't explain the phenomenon.