The North Avenue Rollerway in Chicago, IL also has a Wurlitzer. The Wheels in Motion rink in Wharton, NJ has a Pipe Organ of unknown type. Some skaters actually enjoy multiple modes. If you're curious or want to try something new and different. The more comfortable you are with what you skate on now, the more frustrating the accomodation period.
Most participant sports go though boom-bust cycles.
If there's a good rink scene in your area that allows in-line skates, get them to come out a few times. They may find that it's a nicer way to learn and that music and company help. Remember that if you are patient and like teaching, you can help your friends learn to skate better even if they're on in-lines.