Don't know if this post is too late, but here it is anyway. Glasgow is more of a working city and isn’t as pretty/touristy as Edinburgh. There is a lot to see in Glasgow, and loads of fantastic places to eat, and very friendly people, it just doesn’t have the same look as Edinburgh. The train ride between Glas & Edin is only about 45 minutes, so you can visit both on your trip if you like. All the restaurants/activities listed above are fab, also try No Sixteen in the west end and Two Fat Ladies, city centre and west end. I like Arisaig on St. Vincent’s street. For architecture and CRM please see House for an Art Lover, it is fantastic and has a lovely café for lunch. They are closed for special events at times, so call ahead or check their website. Also see the Lighthouse, Scotland’s Centre for Architectural Design. It has different exhibits so check their website. They also have a café on the top floor, The Doocot, it is a must see for a light lunch and views to die for. There is also a very fun bar across the street from it, Bar 10, serves food and has a great atmosphere for a drink. I would also recommend taking the open top bus tours, if weather permits, it gives you the best view of the buildings in Glasgow ,gives you a good lay of the land, and the tour guides are A LOT of fun. Very knowledgeable and very willing to share the knowledge! Enjoy your trip

For a fish restaurant in Glasgow, I would recommend Two Fat Ladies, either in the West End or in city centre. City centre one is posher looking, but the food is fantastic in both. It can be expensive, depending on your idea of expensive, but they have a pretty cheap pre theater fixed menu (@£25/3 Courses) also a fixed lunch menu. They use fresh, mostly local, fish and produce, and some non fish dishes for the meat eaters. Friendly wait staff. You will need reservations on the weekend though. Enjoy your trip!