If your workplace has decided to go on strike and is doing a mass walkout, stand with your fellow workers. This is a reminder, however, that walking out of work to strike may not be the most effective thing you can do to create change. Striking in place can be much more effective and it will allow you to control the means of production.
To strike in place, you still show up to work, but then you work as slowly as possible, or even do no work at all. Do any work processes, repairs, or maintenance to the absolute letter of the instructions, forgetting all efficiency and common sense. If the book says that someone must do a complete clean and sanitizing of an area every 30 minutes and it's not safe to have customers there while it's happening, then do that. If a machine should be thoroughly inspected before use each day, then inspect every single part and report any issue, no matter how small, and don't use the machine until it's completely safe to do so. If the cleaner has to stay wet for 10 minutes, then it has to stay wet for 10 minutes. If you are required to make sure every customer leaves happy, then by golly make sure they do! Answer every question, preform every task perfectly, give every discount and coupon you can find.
This will dramatically cut into profit and in order to bring in scabs they will have to somehow remove you or block you from the workplace which can be hard to do as you are still doing your job and following policies to the letter. Also, it can take some time for this practice to be noticed and usually by the time it is, it will take a while to fix.