My daughter was in a grizedale townhouse. (introverted, but wanted it because of covid and did not want a small flat in lockdown). She had the best time lol. She felt included and they had themed nights every week. It was a strange time back then, but as time went on and restrictions lifted, she made other friends and she often socialised at pendle bar. Grizedale bar is good, ive had a few drinks there over the time, especially their two for one woo woo. Pendle has the best laundry, but she often used pendles rather than Grizedales as it was bigger. Which ever college you are at you will have a fab time and you will make friends in your own college and other colleges. If you was to choose, think about the distance between college and department. Im guessing its the LEC with it being biology? Furness would be right on your doorstep, where as Pendle Grizedale is about 4-5 mins away, so it might feel separate from your 'home' and work life and you might appreciate that more.