My advice is to engage with the chef. We have been twice now where people (not because they are filming or anything) have sat and ignored the 'show'
Obviously you talk amongst yourselves throughout your meal but the last time we went the other 6 people on the table ignored the chef while they put on their best show. You could see he was disappointed but also it was extra pressure on us because every time he did a trick or said a joke he looked at us because we were the only people who were actually watching.
You get back what you give in this meal, give a little, laugh, have fun, and it will be great!
Don't sit with an angry face arguing with your family and staring at your phone, that's a waste of your money...
Also since others are taking photos of the show, your angry face family skirmish will be ever recorded onto a hard drive somewhere..... oops