I`m new in San Francisco. What are the coolest places in the city? restaurants? bars? club? museums? every think!!

I m downloading it right now

What means "tech bro "? is it a jargon?

When I`m speaking english I really have problems with communication! I can understand everything that the people say , but i don`t know how to express myself. What whould you recommend to help me improve my conversation abilities?