Guests won't leave your kitchen? Put a bar cart in your living area.
Many have storage, serving more like a liquor cabinet on wheels. Designs and materials to fit your home - perhaps a rosewood folding bar by Reno Wahl Iverson for Dyrlund?
You'll need ice in your mid-century ice bucket (Dansk? Oleg Cassini?), bottles of whatever you're offering, appropriate glassware for the beverages (learn if you don't know) and you are ready to literally roll.