Sure, those 3 instruments can play in a group . . . it is not really called a 'band', usually, but it could happen.
The piano can play in any key because it is chromatic.
Just pick a game that you like and you will play your key game.
The way I play it is in the key of C.
Sea Key
Bb. an acoustic guitar can play in any key, like a piano.
To play an A on the piano, locate the black key to the right of the A key and press it down with your finger. This key is also known as Bb.
To play the D/F chord on the piano, place your left hand thumb on the D key, your middle finger on the F key, and your pinky on the A key. In your right hand, play the D key with your thumb, the F key with your middle finger, and the A key with your pinky. Play all the keys together to sound the D/F chord.
To play in the key of C using a capo on the guitar, place the capo on the 5th fret. This will raise the pitch of the open strings, allowing you to play chords as if you were in the key of G, but the sound will be in the key of C.
To play in the key of E using a capo, place the capo on the 4th fret of the guitar. This will allow you to play chords as if you were in the key of C, making it easier to play in the key of E with open chords.
yes it sounds good
To play the D7/F chord on the piano, place your left hand thumb on the F key, your index finger on the A key, your middle finger on the C key, and your pinky finger on the D key. In your right hand, play the F key with your thumb, the A key with your middle finger, the C key with your ring finger, and the E key with your pinky finger.