I made one custom Venue, think it is on the Gallery. I took the university bar and made a small spa beneath it. The spa has early morning hours and the bar runs from the afternoon till about 2 oir 3 am. It works pretty well. And when the bar tender is not there your sim can practice on it if you want. I like that sims show up certain hours for the spa now, and your own sims can choose what they want to do.
i also downloaded a custom venue dealing with Jungle adventure. I use it like a hotel. I downloaded it onto a Tomorang lot close to water. I had to tween it a lot, but except for food not always being cleaned up it works ok. There is a pool that works well.