Lonny,
I thought every night was your regular night?
I, like Lonny, didn't charge extra for this years show, because it fell on Sat. night, and my regular gig booked me in April...
If I don't book with my regular gig, on their regular night, then I will advertise, and usually charge a little extra...
It depends on the size of the venue, and what the contract calls for... usually a $50 increase... but I have gotten much more prior to the economy taking a dump... now it's trying to stay afloat, and keeping those regular gigs, and specialty dates booked as far ahead as possible!
Next year falls on a Monday, and I will let my 3 venues compete for my services, since I don't have a regular gig on Monday nights at this time!