You can absolutely and easily do this. Pop lasts about 20 mins. Exit theater, go left past Infinity Falls construction, right around Shamu Stadium to Bayside Theater. Club Sea Glow is not really a show, just a DJ, costumed performers and guests dancing on a big stage, and it goes on from 8pm right up until the big night time finale, Ignite. I suggest you get back to Shamu Stadium 45 mins (or more, and definitely no later than half an hour) before showtime to get a decent seat, and enjoy the preshow, which btw is probably more entertaining than Club Sea Glow anyway. As soon as the Shamu show ends, hustle back over to Bayside (along with the thousands of other people) for Ignite. Have fun!