Organising Cardano themed meet up

Hi blockchain enthusiasts!
I would like to ask for help from somebody who has experience with organisation of live meetups. I am a Cardano enthusiast who got in for the money (to be completely honest) and fell in love with technology that is going to get rid of financial chains burdening society.
I am gonna try and organise an event in a local bar that could potentionly host up to 50 people so I need some insights from somebody who has already done it. How long should i do marketing? What social networks? Should I make some kind of a deal with the bar owner for free drinks or something? Should I make some merch giveaway, etc.
Any kind of advice or suggestion would be much appretiated!
Than you in advance, yours truely,