Shirin - what town are you considering if you don't mind me asking? The reason I ask is because I just made a new game in Sunset Valley and as long as you aren't looking to make things gorgeous. I was able to put every building from every EP into Sunset Valley without converting any of the rabbit holes (other than the stadium) and still had one of each bar. Like I said it wasn't pretty, but it covered every building/park.
I'm completely burnt out on SV, so I'm using Riverview at the moment. It's much flatter than SV, so I have less of the "unroutable terrain" issues I seem to have in SV.
So far, I've been able to convert existing empty lots, and can use the Big Park/Stage, the Big Venue, Private Venue, Live Venue, Coffeehouse. I was able to squeeze in the smaller Equestrian Center, smaller Horse Ranch, add the Pet Shop, a Small Park, the smaller Movie Set, a Laundromat (and correct the alignments of the Consignment Store and Junkyard). I should theoretically be able to add the bars, but Mixology doesn't particularly interest me, so I haven't actually tried.
So I shouldn't
need to bundle rabbitholes, but if I do need to, I certainly would want to keep that option open.