You want to calibrate exactly when you go to eavesdrop on this drunken conversation between Arthur C Clarke, CS Lewis, and JRR Tolkien. You don’t want to get there too early. Two drinks is too soon; five drinks is too many. You want to arrive somewhere between three and four ales apiece: that’s probably the peak point for Awesome Drunken Conversations.
…What? Recording awesome stuff on the sly is the only really ethical use of time travel that I can think of. I mean, you don’t want to actually change anything, right? …RIGHT?