JimmyDR,
Well, since you arrive fairly early (for San Jose nightlife) on Saturday, the town is your oyster. Per Prolijo, Bar Idem might be an excellent start. Remember however that they close at midnight; you'll need to select a lady before 11:00 p.m. if you want your full hour's worth.
El Pueblo will be smokin' and swinging through the wee hours of the morning. All the late-night tico spots (Bar Monaco, Arkada's, VIP's #1, Molino Rojo, le Grillon etc.) will be rocking through the dawn. In short, you'll have no shortage of choicres, and frankly you wouldn't even need to set foot in the Blue Marlin if you chose not to do so.
Have fun. Say hello to everyone at Sportsmen's for the blind dude.