I agree that a lot of these suggestions are ridiculous, lol.
Just have what any successful bar has. Great specials, great environment, friendly staff. As far as "bike friendly" amenities, obviously just have a lot of things to lock a bike to.
I think its more important that you reach out to the bike community and get your name out there. Sponsor riding events, host post-ride happy hours, things like that. That will draw in bicyclist and also help you network at the same time.