Hi Accordionist,
I live in Southern California and will play at a Irish Dance at a senior community. I am a "one man band" (sorry Tony), no singing, but play mostly Big Band, a little Latin, jazz and a little country mixed in.
I will be playing for 3 hours, have two 10 minute breaks and dinner included. I live in the community and know most of the people. I set my fee for 3 hours at $150.00. I would go 4 hours for an additional $25.00, since I am all set-up. They kind of balked at the fee, but I feel my investment of the keyboard, speakers, time and etc. are worth it. I don't consider myself a pro as Uncle Dave is, but I have played for weddings, parties, church and dances occasionally. Hope this info helps in forming your own fee. Good luck and happy playing.
Best Regards,
Dave