On the west end of Spring Street, is the Ear Inn and a few other bars/restaurants.
Every Tuesday is an unofficial "European Bike Night". Although it has become much more an all brand event with a decent showing of Japanese and American bikes it is pretty much dominated by Ducati and BMW, and, you can expect to see some Moto Guzzis, Triumphs, MVs, MZs and Aprillias. It's typically gets going around 7 or 8. By 10 or 11, depending on the weather, it winds down.
The scene is pretty friendly, and people are easy to talk to. Most people come in groups or meet people there. There is always a good showing of Monsters and usually some more unusual rides from tricked out Vespas to "street legal" 2-stroke race bikes.