2x to 3x at LEAST, but as ALWAYS, it depends on what the 'traffic will bear', the venue, what they are charging the public, the relationship between the establishment and the musician, etc. ... In the past there were times when I was working steady, say at a nice restaurant, if the management wasn't doing anything special, except perhaps a 'champagne toast' at midnight, they often couldn't see why they should pay the musician anything more for NYE ....
t.