I think this is probably not too hard if you mostly play one style and you have some lead sheets. Caveat: I haven't played in a band myself. Well, I have, but not on piano. Last time I saw a band perform with a keyboard I wandered behind and watched. All he was playing was closed position right hand chords, mostly using his left hand to adjust knobs and play an occasional bass note. Also, most bands play in a very few keys, you don't need your chords in all 12. If it is a guitar band, there may only be 3 chords to learn, and all songs may be in G or D. I work with a church group like that. You need to evolve a strategy. Probably it will be something very simple like root, octave, 5th above, 3rd, octave, repeat with left hand, and close position chords with the right hand. Don't make it too complicated because you have to keep it up for 4 hours.
Thanks for your reply.No, I don't really know any specific chords/scales, so I guess I should start learning them. I didn't really get more out of it than "one note" stuff, so that's not really a good start. I won't have any trouble with playing the Piano in the band, in a technical way, because the songs we're gonna play aren't really technical demanding.
It sounds like you should be playing chords - in other words, what the rhythm guitarist usually does.Get them to write down the chord progressions for each song and then learn the root, first inversion and second inversion for each chord. You can get a good full sound out of straight major and minor chords, and then learn to add extra notes later to get major 7ths, dominant 7ths, and 'add 9's... all poppy chords.With your left hand, hit the bottom note of the chord on the downbeat and then the other two notes on the upbeat - that's a basic drum pattern which sounds appropriate for pop keyboard. Because it sounds choppy and dull though, you have to do some interesting rhythms with the right hand, keeping the chords close to one another by using suitable inversions. Don't go all over the keyboard or it'll just sound overbearing, and (a cardinal rule here) don't solo or spiral while the vocalist is singing. Wait for your solo before doing anything fancy, or you'll quickly piss everybody off. Try and keep it rhythmic, like a combination of drums and strummed guitar.If they won't give you the chords, then use the bass guitar line to work them out. 99% of the time the bass plays the root note at the start of every bar; so if you hear a G it's either a Gmajor or Gminor chord. Easy.Hope this helps!
Yeah, I'm playing in a guitar band. We're with 1 drums, 1 bass, 2 guitars and a singer (and yes, it's a church group!).