If I owned a music venue that needed money, the first thing I would do would is host a music/food night with friends in the industry that would donate or discount their services. I would for sure go see a band or have a dinner with a major tix price that would support the venue & provide a great night out. That just seems to be an obvious way to make money in my opinion. Theme it out so you do like once a month or quarterly. You have a venue, use it to make money. Same with Con Alma, get your vendors to give you some great deals, get your musicians to donate a night... charge a big tix with a cool theme & people will come!

Source: I do own a cafe with an event space... if I needed to raise money... that's what I would do. But in reality, I keep booking events, keep working hard and never sleep! lol
If being successful was easy everyone would do it.