Honolulu is testing later closing times for bars, which is good news for nightlife businesses and tourists but worrying for police and nearby residents.

• The Honolulu Liquor Commission now lets Oahu bars apply for a special license to close at 4 a.m. instead of 2 a.m. on certain occasions.
• Police expect more fights and assaults, pointing to late-night violence already caught on video on streets where bars run till 4.
• Waikiki residents and business groups say the area is short of officers, and want bars with late hours to pay for overtime police.
• Bar owners argue legal, supervised late-night venues are safer than the illegal gambling dens and underground parties people turn to instead.
• The rules bar new entry after 2 a.m. and stop alcohol sales after 3, with a team assigned to enforce them.

Outlook: Expect fights over staffing and public safety as more bars apply, with the public able to object to individual licenses.