Jimmy B's is a great tiki-type bar on the beach. It's hidden behind the Best Western hotel (you have to walk through the lobby). There's always a live band and a dance floor, if that's your style, or just sit on the deck, feeling the ocean breeze while watching the sunset!
Darlene is the best bartender--ask her to make you her signature drink, the Wet Spot! This place is fun and casual. I've been several times by myself, and I never feel lonely or uncomfortable.