Sure -- this is like playing roulette, (game A, a constant-losing-odds game,) while simultaneously watching the blackjack table (game B,) waiting for the deck to become favorable. As soon as the card count gets high enough, switch games. Once the blackjack game turns negative, switch back to roulette to pass the time.

This should be a winning strategy, against two losing games. The key is that the odds in game B vary, and you structure your gameplay such that you're mostly playing game B when the odds are better than even.

Oh, and you'd likely be kicked out of any casino in Vegas for doing this.