This venue tends to be busier than the other, people were moving around quite a bit. Consider that if you’re sitting at a table that doesn’t have a Silence / Whispers sign the event coordinator won’t know whether you’re being interrupted and do anything.
Put another way, if you’re deep in your book and some stranger taps on your table to get your attention through your headphones, if you’re not at a Silence table the event coordinator won’t do anything about it.
The coffee’s good, the staff are great, but the noise level is high. Noise cancelling headphones and a pinknoise generator is definitely a good idea.