They've seen it all over the years at the Club Waterloo, located in an old colonial mansion set beside a narrow saltwater estuary known as Lake Waterloo. To qualify for the $5 cover charge, you can purchase a visitors' pass from most taxi drivers, which will get you inside the door. If you're not registered at a hotel, the cover charge is $20 Sunday to Thursday, going up to $30 on Friday and Saturday. But despite these high prices, you'll get the feeling that very few people actually pay full price: It's management's way of screening out the bad drunks. The main bar is open nightly from 8pm to 4am, and the sports bar is open from midnight to 4am. Three other minor bars include the Shooters Bar, where shots go for $2, an open-air pool bar, and a Bacardi Bar, which specializes in its namesake. The crowd tends to be an eclectic mix of locals, Europeans, and American vacationers, both singles and couples.