Glad you'll be joining us. I'll add your name to the other thread I started (Friday the 13th (Oct) Peep Meet).
La Ranita is easy to find.
From your hotel, just walk up to 5th Avenue and turn Left. Then walk up to 10th Street (Calle) and turn Right. La Ranita is the bar at La Rana Cansada hotel. It'll be on your Left.