For @Writingonthewalls and anyone in London who is interested, I have been using this seatfiller site for the past year or two. I am now a premium member and get a lot of good deals. All Show Listings | London | Central Tickets. I decided when the kids started drifting away that this was my time to explore the world of theatre and dance. I am not minted; I spend about £50 to 75 a month on the theatre, but I rarely spend on clothes or beauty stuff, and we don't even have a car! (
Warning: there's a lot of junk as well. I have set up a separate email account for the mails.
Other tips: I usually go alone, as I get far better seats. Nobody else seems to want to go alone, so I get all the unsold tickets! For Swan Lake, I got offered this £15 ticket on the day of the event, in the third row from the stage, which are usually over £100. I am in London Zone 3, so can usually make it in time for any events even on the day.
I have also managed to see lots of great stuff at only £15:
Guys and Dolls at the Bridge Theatre ( really fantastic; I highly recommend the immersive seats if you can stand for 2 hours)
Vivaldi 4 seasons performances at Southbank and elsewhere by various orchestras
NYC ballet at Sadler's Wells
Various comedy gigs ( DH likes those so I go along)
Various off West End plays, which were quite good value.
Lots of talks on everything from Van Gogh to the Tudors.
I am sure there must be other seatfiller sites. I also sometimes go to the Last Minute theatre booth in Leicester square and get whatever single tickets are going.
I met a lady next to me who was also alone at Swan Lake. She too has spent a lifetime taking care of everyone else, and she now spends her limited budget on theatre and music tickets. She had been to everything playing and gave me lots of tips on what to see!