If you can reschedule your original band stuff to Sunday then I'd say go for it for the experience and money.
If you can't then it might not be worth giving up a fun originals project for a gigging band playing music you dislike. It might be better than to find another band that isn't gigging as frequently so you can still have some Saturdays with your originals band, and maybe music you like better as well.
That said, I find I enjoy playing music even more than listening. Given that, there is a lot of music I enjoy playing that I would not enjoy listening to. As another poster noted playing with other good musicians is fun, and playing for appreciative crowds is fun, and getting paid well is fun, all of which can make up for playing music which is itself not inherently fun to play.
If you can't then it might not be worth giving up a fun originals project for a gigging band playing music you dislike. It might be better than to find another band that isn't gigging as frequently so you can still have some Saturdays with your originals band, and maybe music you like better as well.
That said, I find I enjoy playing music even more than listening. Given that, there is a lot of music I enjoy playing that I would not enjoy listening to. As another poster noted playing with other good musicians is fun, and playing for appreciative crowds is fun, and getting paid well is fun, all of which can make up for playing music which is itself not inherently fun to play.