Another vote for R&R and I wasn't even using an arranger when I worked nursing homes (guitar and backing tracks). Several of the facilities were large with different sections and required a considerable trek to get where you were going. I remember one facility where after a certain hour you could only use one door to leave (for security I guess) and it was not close to where I setup. R&R was also a good conversation starter-the residents were often fascinated the fact that it changed size.