Dave & Busters is like Chuck E Cheese for adults.
From what I remember from a one-time decade ago, you can play games and video games, collect tickets to exchange for prizes.
Imho, it was loud, distracting, and triangulated any attempt at personal conversation.
On the flipside, maybe because it is more casual, requires movement and limited bursts of attention, maybe it helps time pass quicker compared to a date that may be awkward and long if there was no chemistry. It at least makes for a good excuse to go to such a venue.
I have never been a yeshiva bochur who was faced with going on a series of dates. Maybe they take the dates that they still like after D&B someplace where they can get to know each other better.
Also… maybe the bochurim want to see the girl in action. See how they work together to pick an activity, respond to rejection if they lose, etc things that may occur organically in such a setting.