Fun Fri & Sat workouts for 8-5 M-F schedule

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Hi all,
Any suggestions for fun Friday and Sat workouts? I work until 5 pm Fri, off Sat. I will do the gym Fri but I get bored on machines & I do Zumba in the Circuit Sat mornings but it's not challenging enough. Weekdays I do regular Zumba, I love it but my instructor doesn't offer the regular class weekends anymore. I'm interested in the yoga classes, the Zumba exhilerate dvd collection or the Brazilian Butt workout videos but if there's anything new and exciting you have found please share! I want workouts to be challenging and enjoyable. I will even run outside when good weather comes if you have any GREAT workout music to recommend. I just want to stay active and interested, Fri and Sat have been a challenge. Thanks

PS I'm 24 and in pretty good shape ,so I'm physically capable of trying all kinds of suggestions