SeaBunny mentioned that her TA is on Pursuit which doesn't have a TK Grill or a Patio Grill. Unlike the larger ships, Earth & Ocean is served in the Colonnade a couple of times per week. A limited Sushi is served from 6 to 9pm in the Club on Deck 9.
Our favourite dining venue on Venture (Pursuit's sister ship) was on the deck by the stern Infinity Pool outside the Colonnade. We also enjoyed afternoon tea in the Constellation Lounge (Venture & Pursuit's equivalent of the Observation Bar) and coffee in Seabourn Square.
The Bow Lounge on Deck 6 has instrument clusters which mirror some of the information from the Bridge and a self-serve coffee station with a variety of treats. The Expedition Lounge on Deck 4 has a bar and comfortable seating by artificial fireplaces. On our cruise to Greenland, the expedition team gave informative talks in the adjacent Discovery Center which was also the venue for evening entertainment.