Moustache bars have worked well for over ten years on my town bikes-a 1965 Moulton Stowaway and a 1980 Le Juene Track bike both with a F&S Duomatic 2 speed coaster brake hub. On rides longer than 25 miles I sometimes wish for more hand positions but around town shopping and commuting they are great.
You can also reverse them for a more upright position which worked well when I tried it briefly.