Apart from your keyboard, do you really need an amp at all?

Somehow there seems to be an assumption that however small the venue, if you are performing, you must have a PA. Surely in a small space, even a largish dining room, there is no need for a PA. Learn to project your voice and no PA reduces the chance of instruments dominating the vocals.

Also there is this issue of volume with seniors. They really don't like too much of it and an the intimacy of a purely acoustic performance is much far more satisfying.