If youve caught the Williams Brothers Band playing around town, you know theyre full of surprises.Theyre playing Friday and Saturday night at Midnight Rodeo and the unexpected can again be expected.Because, although James and Phil Williams do sometimes play acoustic sets, with just themselves and their guitars, youre more likely to catch The Williams Brothers and Friends.When we do shows, you never know whos going to show up and take the stage, said lead singer James Williams.James and Phil grew up in the Bay Area near San Francisco, where they were influenced by the funk music in the streets, psychedelic music of the area and their parents collection of blues, one of the most comprehensive in the Bay Area.Theyre a jam-band, yes, but the label homegrown boogie music stems from the fact that you never know whats going to pop into their songs.Its definitely organic, James said. Its how its put together on-stage, depending on whos there.The best thing about it for us is we get to bring different people up on stage and they all bring their different flavor. We incorporate it into what were doing and its a totally separate project, we come out with something different.Like the time when the rhythm section from Lionvibes sat in and the band played one of its regular covers, Shady Grove, but played it reggae style.Williams gave the analogy of making a salad.Sometimes you use cucumbers and tomatoes, he said. Other times youll use avocados and celery. Its a different tasting salad, but just as good.Donny Morales and maybe even a couple of cats from the Pineapple Crackaz will sit in with the Williams Brothers on Friday night.As for Saturday night? The rest of the WBB, bass player Steve Williams (who also plays anywhere and with anyone he can) and drummer Jimmy Williamson, will be in the house. But Williams wouldnt tip his hat to who the friends might be.You gotta show up and see, he laughed.Thats not all Williams has up his sleeve. Williams also runs Raindance Promotions, booking bands for Midnight Rodeo and other venues in town. He runs Raindance out of his store, The Muse, in Fruita.In fact, Williams is a busy man these days. The Muse is having its first-anniversary sale this weekend, with tons of giveaways and specials. He also runs the Battle of the Bands on Thursday nights at Rum Bay and is getting ready for the upcoming Desert Rocks fest in Utah.Hes got something else going down, too. But he wouldnt say what.Williams said he has a huge announcement coming up soon, but wouldnt say what it was. One has to think it ties into the fact that Midnight Rodeo is shutting its doors after next weekends act, Grindstone.But whats the announcement?I cant say, Williams said. All I can say is that these next two weeks are customer-appreciation weeks. Theres no cover for anyone 21 and over and there will be mad drink specials.Cmon, at least give a hint as to what youve got up your sleeve.Cant do it, he said. All I can say is its important to get people out there. If people want live music in the Grand Valley, they need to get out these next two weeks.Who knows what to expect?Go & DoWho: Williams Brothers and FriendsWhere: Midnight RodeoWhen: Friday and Saturday night at 9Cost: No cover for anyone over 21 Kind of like seeing a Williams Brothers Band show.