In many live games table dynamics are so much more important than the cards you are dealt that you should be able to play a huge range of cards in late position.
If the table is extremely tough like you said, Well shoot, I might just stand up and take my cash home. If you don't want to do this then you have to just tighten up and wait for good cards taking opportunities to steal where you can.
Finally, when you are not in a hand there is much to see and learn. You are still playing the game, and you can still practice putting people on ranges and noting how they react under various circumstances. You may even find the table isn't as hard as you might have thought.