Carmen was very nice but we had hoped for more of a tour rather than just sitting at a cafe with someone new. Perhaps some interesting information about the cafe or the building it is in, why you chose that specific cafe, which types of cake are traditionally Estonian or Russian, when those sorts of cakes would be eaten and so on would be interesting information to offer. I would recommend taking people to three cafes and having one specific thing at each cafe (sharing is great). Perhaps one cafe with great coffee, one with excellent treats and one with a perfect cozy atmosphere. It was a bit weird to go to cafes to just look inside and not stay so maybe if you only go to one cafe just offer suggestions for other additional cafes to visit at a later time (no need to stop by each one).