pick up an old empty wooden cabinet with a couple doors on the front that provide open access, or better yet something that matches your decor and stick ANYTHING inside that would fit the bill for a small practice amp (even an ugly one) ... swing open the doors, plug and play ... it will make the little amp sound bigger, and also look like part of the furniture when not in use .. if you are married, even let the Mrs put stuff on top and make it 'hers' 
