14Open questions and known gaps
The short version: What we looked for and could not pin down well enough to print. If you can source any of it, the corrections desk below wants to hear from you.
Still digging
11 things we could not source well enough
Each of these would make the guide better. Send a source and we will add it, with credit if you want it.
- Why 2 a.m. became the common US bar closing time after Prohibition ended
- Which other US states still have Sunday (blue law) limits on serving drinks in bars and restaurants, as of 2026
- Court rulings on discriminatory door refusals at Berlin clubs
- What share of a club's revenue comes from the bar versus the door, from a trade study
- The standard booking agent commission percentage for DJs, from a primary or trade source
- Recent (2023-2026) fees paid to mid-tier club DJs, from trade press
- What share of club bartender and server pay comes from tips
- An official count of Boston or Massachusetts club and bar closures since 2020
- The year Berghain began covering guests' phone cameras with stickers, from a primary source
- A study of ride-hail surge pricing around bar closing time
- Whether Boston's 3 a.m. home rule petition got a council hearing, vote or Legislature action after June 2026