Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Nightler - Find the people. Live the night.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Tablelist - OpenTable for nightlife
Better Uptime - We call you when your website goes down
BottlesTonight - Simplified bottle service booking at clubs and events