I think dance/specialist shows sounded right on Galaxy, especially as Galaxy was serving that audience, it was a "dance and rnb" station until Global bought it.
Especially when the "Galaxy Weekend" in-brand came from the late 90s, that was the era of the Superclubs/Human Traffic etc., Galaxy was mainly a northern brand, manchester/yorkshire had huge club scenes and everyone was at Gatecrasher, Hacienda etc every weekend, ibiza was big news - clubland/mix cds were all over the charts, it was the golden era of commercial dance in the UK. I remember hearing Galaxy "in the mix" with Boy George at midday on Saturday lunch time and then right through til 6am next morning, it was House/trance mixed all weekend.
Sadly those days are over now, the superclubs are now closing/closed and just do events, Galaxy is gone, and Capital is a top 40 station.
Capital has more in common with Key 103 than Galaxy/Kiss 102, so it wouldn't make sense for them to go specialist dance on weekends these days, they still do Andy Durrant just as a hang-over from the old Kiss 102/Galaxy licence of the 90s because they have to, it sounds very out of place though. And I imagine it'll go as soon as Ofcom let them.