[hack_fraud13]

You’ll face a high regulatory and liability burden, but neither of those are insurmountable (note that I am not a lawyer or financial advisor and this is not legal or financial advice). Liquor license to serve drinks is the first that comes to mind. Then there’s the risk factor that running a bar involves dealing with unsavory people (people who start fights, harass, other levels of petty crime and violence). You also need to screen guests for valid IDs.

You need a rent-a-bouncer service for your hosts, too at the very least.

Again, not impossible but difficult (and solving the difficulty is the whole value prop of a business). Consider synergies with other event organizers, especially in the music scene.

[informal007]

Totally right, regulatory and liability burden take the huge part of cost.

However, Consumers can take some of these responsibilities, That's why the price of service mentioned by OP can be less expensive.

[nyclawyer]

Yeah, your right. There are certainly some regulatory challenges with liquor and if a host a serving food. But to get around the liquor license issue, it could be byob. The events also do not necessarily have to involve a party - it could be other events focused around a theme or activity.

Bouncers for hosts would probably not be necessary. I've used airbnb experiences before and this is basically the same concept. Airbnb doesn't have bouncers for their hosts. The ability to leave reviews by both hosts and guests would deter bad behavior. But this is an issue I need to dig deeper into.