The Comedy Grotto is a night of top laughs, tipped as hot property by The Independent and The Sunday Times. Time Out praises its "consistently excellent line-ups" and this one's a belter with Edinburgh Comedy Award Nominee Sarah Kendall, plus the New Yorker's favourite anti-comedian Ed Aczel, and whip-smart So You Think You're Funny Winner Ivo Graham. It's free entry but donations welcome after in aid of Syria Refugee Relief. Over 18s only. Valid ID required.