If I'm honest, I can't stand still.
I don't care if it's a small pub or a large festival, the people that have come to see you deserve to be entertained - whether it's a carry on style banter between members over the mikes, and / or the visual performance, people deserve a show.
for example, I often take a book to read during the intros to ac/dc songs with the cover band. I look for amusingly titled books - the current one being "50 shames of earl grey" by craddock Merkin
(I love the alternative provided by the profanity filter!! )