We are exploring this possibility and would like to know if anyone else has tried this. I heard some people at the conference a couple years ago say that they did this successfully and would like to know what the pros and cons you discovered were. Thanks!
We have done that, and we have found it to be helpful. Our organization has a facility fee built into the ticket price of every ticket purchased on our campus in addition to our handling fee (or group/subscription fee when relevant). The handling fee is still broken out, but the facility fee was incorporated into the ticket cost about three and a half years ago.
We are a young organization, just celebrating our fifth anniversary season, so it is not like our patrons have been used to seeing that facility fee for years, but we did find that people respond better to "tickets are $45" rather than "tickets are $42.50... and there will be a $2.50 per ticket facility fee as well", and that is simply because people do not like paying fees. We generally price our events so that the net result of an even dollar amount, but even if you go with prices that result in odd figures, like $48.50, we have found that patrons still like paying that better than paying $46 for a ticket plus a $2.50 fee. Some patrons understand that fees are part of the game and just go with it, but those people who love to avoid fees will ask how to avoid them. With some fees you can tell patrons how to avoid them as to whatever it is based on your organization (e.g. our organization waives the handling fee if they purchase in person at the Box Office). On the other hand, fees like a facility fee usually can never be waived, so when you tell that to those patrons who do everything they can to avoid fees, they hate it, especially with per ticket fees. They are happier just paying a little more and not knowing about it.
We set this up in Tessitura by just using another ticket price layer specifically for this facility fee which, now that we are in V 12 is very easy to do using templates since it is flat across the board for every price type.
The only real downside that I have seen has to do with resident companies, if you have any. We had a few here, and I have heard some at the conference chatting about similar experiences, who wanted to break out the facility fee so they could communicate to their regular patrons that they were not changing or raising prices but that this was simply an unavoidable fee for this campus, but over time they have (mostly) come around to seeing it our way because again, people do not like paying fees.