Regular weekly shows often change venues. The person DJing will often tell you where they are coming from. If they don't mention it, you can generally do the following command:
/tell gridbot playing
and you'll get something akin to the following:
Gridbot: ACDC - Big Balls [~Under Pressure~ feat. DJ Dani *LIVE* at the Glass Dance Floor (RK1)]
You'll notice the location and dimension in that information as well as the song that is currently being played.

By far one of the best commands to know!
If for some reason their location isn't listed there, you can do the following command:
/tell gridbot say <a message>
Of course, replace the "<a message>" with something like "Where you live from tonight?" and the DJ on air will respond either via tell or on the air at the next opportunity
Welcome to the insanity, you'll find bagels in the fridge.