That will end up causing even MORE regulations & restrictions, - tell you why. How many people can "safely" use a house, or almost ANY property. Every place will end up needing a permit from the local fire department - including home owners. Houses will be restricted on "how many people" can safely assemble there. Are there enough parking places to accommodate all the people? If not, will the over-flow (street parking) cause a safety issue for emergency vehicles? ... City/town councils will love this, - hearings for months, and new regs, and new license fees, - just to have a few folks over. ... (Watch out for that back yard barbecue - it's next)