Pub Quiz

The Exhibit hosts a quiz night each week, running when the venue opens on Wednesdays. It's free. You come for the questions, grab a drink if you want one, stay as long as it's worth your time. Low-commitment midweek option.

The slight twist is the setting. The Exhibit has exhibition space alongside the bar, so you're not in a standard local. Whether that matters depends on you, but it means there's always something else to look at if the quiz quiets down or if someone in your team needs a break from thinking. Balham's got enough choice that you need a reason to pick somewhere, and 'quiz in a gallery' is specific enough to work.