I'm getting married on april 16th. It is possible to go there around 6pm to get some drinks at the patio with some friends?

I would make a reservation.

The Bar itself is usually first come first serve... I agree withe the prior review about calling ahead to see if you can reserve some tables.

I don't see why not. They have a bar area that opens up to tables on the patio. There are also tables in the bar area. I would give them a call to see if you could reserve a table as I would imagine that 6 is a busy time. They always seem to be very accommodating.