I have owned and helped build swing bikes for over a decade now and this is probably the last one I'll have built.
It's got all the features a good swing bike needs: a 3 speed rear hub...small sprockets.. and hand breaks to go with normal breaking. These features make it easy to ride on a crowded boardwalk.
Below are photos of this and previous swing bikes I have owned.. and a demo of me swing biking a few years ago.
Now if the sun would just come out and let me get back out on a beach boardwalk somewhere...