What percentage does the venue take when hosting a gig?

I may have the opportunity to host some bands at my house because I have a lot of space. If we were to sell some cheap cans of beer and collect a cover charge, what is a normal cut for “the house” to take?

Note: this is not an opportunity to dispute the legality or “ethics” (“dude this shouldn’t be about money mannn!”), I just want to know the normal percentage of the revenue that the venue takes.