Astroman's climbing gym

[crimptacular]

My wife and I are spending a couple of days in Seoul before heading back to Canada and I'm probably going to hit up a gym once or twice while in the city. We're staying in Myeongdong and based on that, it looks like Astroman Rock Gym is the closest. The gym looks good for some bouldering. Are any evenings good in particular?
As well, I've looked at some of the bouldering sites in and around Seoul and some look pretty cool. As long as the weather is good, are there any particular boulders I should check out this upcoming weekend?

Thanks in advance for any info.

Cheers

Adam