Wonging around in pitch games is definitely more of an art, but it is possible for short periods of time (usually an hour or less, which is the average session for many players). I used to do this in downtown Vegas fairly often. When the count goes south in the first few hands, head for the bathroom. Keep an eye on the other tables as you pass them on the way to the bathroom (walking slowly). If any of them heat up (it often only takes 1-2 hands in pitch games) then jump in for a few hands, then continue on your way to the bathroom. If you lose then you can say something like “Man, I knew I shouldn’t have stopped” and if you win then you can say “Yup, I can spot a hot dealer from 100 yards away!” Phrases like that can be good ways to get away from a table after only playing a few hands.
Do the same thing on your way back from the bathroom. You can sometimes Wong into 3-4 different tables per break (always at + counts) using this technique without getting much heat. When (if!) you get back to your original table you can say something about getting lost, seeing a friend or spotting a lucky table somewhere else. The pit bosses love to hear that kind of stuff.
I was able to get away with this about 2-3 times per hour, and when the casino has more than one pit you can get away with this trick for even longer sessions. As always, timing your breaks to coincide with busy times in the pit will be all the cover you need.
-Sonny-