We have a new one here in CoSprings called CafeVelo. They are doing well.
Have separate staff for cafe and lbs - in both they have well qualified personel.
In a fairly affluent part of town, up and coming area - they sell high end bikes - cheapest being around $2,000, road mtn. and Tri, BMC, Cervelo and Spec.
Their challege is really space - the need more for the bike shop for sure - and could also expand the cafe.
Cafe attracts healthy hipsters, college kids and cyclists - usually busy. Serve healthy sandwiches and pastries, coffee of course.
I'm in there often as I trust the mechanics and like the food.
They mostly charge MSRP - whhich I think is one of their achilles heels - there are many options for discounted quality parts. They do a great business in repair.
Point is, it can work with research and business foresight. Good Luck