Hippie bar Cary Street Café has been entertaining lovers of jam bands, reggae, bluegrass, rock and alt-country acts for years. Now, it’s officially becoming a legal adult. The bar commemorates its milestone with an 18th anniversary party, featuring live music from the first two bands to play at the cafe — Blues UnderGrass and the Harrison Deane Band (formerly Whistler’s Mother) along with a few additional birthday surprises. Cary Street Café celebrates 18 years on Saturday, Feb. 9, at 9 p.m. $7. carystreetcafe.com.