How many members does your Guild have?
We have an upcoming meeting where we'll have a "round robin" of demonstrations by about 10 of our own members. Each will have a table & about 10 minutes to demo a technique - needle-turn applique, bindings, paper piecing, etc. The rest of the membership moves from table to table to see each demo. Some of the "teachers" will even have hand-outs. :D
If your guild is smaller, you could have fewer tables & longer demos.
We have also had a pot luck where we also played "Strip Poker". Each member brings as many 2.5" WOF strips as they want to play with. Again, depending on the size of your membership, you break up into tables of about 10 players each. Each player "antes" with one strip, & one of the them deals one card to each player. The person with the high card wins the pot! That's always a lot of fun - if I remember, I'll post a pic of the small quilt I made with the strips I won :D