Very nice touch Ms Brown. I'm more into craft beer myself though not at the beer snob level. If I walked into a provider's incall and she had Sculpin or Southern Tier Chokolat Stout I'd be pretty impressed! Still, can't go wrong with the choices you made for broader appeal.
If you'd like to start stocking spirits and want a single malt Scotch recommendation, the two most popular in the U.S. are Glenlivet 12 Year ($45/bottle) and The Macallan 12 Year ($55/bottle). Neither are that fantastic for someone who really drinks scotch but they're the most familiar. If a restaurant or bar only has 2 scotches it will be those two most of the time.
If you just want to have a perfectly decent but inexpensive scotch on hand you can go with the Glenmorangie 10 year ($35/bottle).
If you are only going to have one Scotch offering but want it to be a solid one with broad appeal to many scotch drinkers I'd recommend the Balvenie Doublewood 12 year ($55/bottle).
Stay away from anything peated as it's an acquired taste not to everyone's liking.
Oh and for blended scotches to drink on the rocks or with soda a very popular and reasonably priced choice would be Johnny Walker Red Label ($25/bottle) or Black Label ($35/bottle).
Again, it's the thought that counts more than anything and stocking your incall like that is a very nice touch